Sjoerd Maessen blog

PHP and webdevelopment

PHP hook, building hooks in your application

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Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

Warning: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /home/smaessen/domains/sjoerdmaessen.nl/public_html/wp-content/plugins/source-code-syntax-highlighting-plugin-for-wordpress/geshi.php on line 2147

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Introduction
One of the real challenges in building any type of framework, core or application is making it possible for the developers to hook into the business logic at specific points. Since PHP is not event based, nor it works with interrupts you have to come up an alternative.

The test case
Lets assume we are the main developers of a webshop framework. Programmers can use our framework to build complete webshops. Programmers can manage the orders that are placed on the webshop with the order class. The order class is part of our framework and we don’t want it to be extended by any programmer. However we don’t want to limit to programmers in their possibilities to hook into the orders process.

For example programmers should be able to send an email to the webshopowner if an order changes from one specific delivery status to another. This functionality is not part of the default behavior in our framework and is custom for the progammers webshop implementation.

Like said before, PHP doesn’t provide interrupts or real events so we need to come up with another way to implement hooks into our application. Lets take a look at the observer pattern.

Implementing the Observer pattern
The observer pattern is a design-pattern that describes a way for objects to be notified to specific state-changes in objects of the application.

For the first implementation we can use SPL. The SPL provides in two simple objects:

SPLSubject

  • attach (new observer to attach)
  • detach (existing observer to detach)
  • notify (notify all observers)

SPLObserver

  • update (Called from the subject (i.e. when it’s value has changed).
  1. span class=”coMULTI”>/**
  2.  * Order class, adding, inserting, updating and deleting orders
  3.  *
  4.  * @package Shop
  5.  */// Order statuses
  6. /**
  7.          * OrderRef
  8.          * @var int $iOrderRef
  9.          *//**
  10.          * Status
  11.          * @var int $iStatus
  12.          *//**
  13.          * List of attached observers
  14.          * @var array
  15.          *//**
  16.          * Constructor
  17.          *
  18.          * @param integer $iOrderRef
  19.          */‘Orderref should be of type integer type "%s" is given’// Get order information from the database or an other resources
  20. /**
  21.          * Attach an observer
  22.          *
  23.          * @param SplObserver $oObserver
  24.          * @return void
  25.          */‘Observer is already attached’/**
  26.          * Detach observer
  27.          *
  28.          * @param SplObserver $oObserver
  29.          * @return void
  30.          */‘Observer not attached’/**
  31.          * Notify the attached observers
  32.          *
  33.          * @param string $sEvent, name of the event
  34.          * @param mixed $mData, optional data that is not directly available for the observers
  35.          * @return void
  36.          *//**
  37.          * Add an order
  38.          *
  39.          * @param array $aOrder
  40.          * @return void
  41.          *//**
  42.          * Return the order reference number
  43.          *
  44.          * @return int
  45.          *//**
  46.          * Return the current order status
  47.          *
  48.          * @return int
  49.          *//**
  50.          * Update the order status
  51.          */// …
  52. // …
  53. /**
  54.  * Order status handler, observer that sends an email to secretary
  55.  * if the status of an order changes from shipped to delivered, so the
  56.  * secratary can make a phone call to our customer to ask for his opinion about the service
  57.  *
  58.  * @package Shop
  59.  *//**
  60.          * Previous orderstatus
  61.          * @var int
  62.          *//**
  63.          * Current orderstatus
  64.          * @var int
  65.          *//**
  66.          * Update, called by the observable object order
  67.          *
  68.          * @param Observable_Interface $oSubject
  69.          * @param string $sEvent
  70.          * @param mixed $mData
  71.          * @return void
  72.          */‘Order number %d is shipped’, $oSubject->getRef());
  73.                                 //mail(‘secratary@example.com’, ‘Order number %d is shipped’, ‘Text’);
  74. ‘Mail sended to the secratary to help her remember to call our customer for a survey.’

There are several problems with the implementation above. To most important disadvantage is that we have only one update method in our observer. In this update method we don’t know when and why we are getting notified, just that something happened. We should keep track of everything that happens in the subject. (Or use debug_backtrace… just joking, don’t even think about using it that way ever!).

Taking it a step further, events
Lets take a look at the next example, we will extend the Observer implementation with some an additional parameter for the eventname that occured.

Finishing up, optional data

  1. span class=”coMULTI”>/**
  2.  * Any object whose state may be of interest, and in whom another object may register an interest
  3.  *
  4.  * @package Interface
  5.  * @version $Id$
  6.  *//**
  7.          * Attach, attaches an observer that will be notified on specific events
  8.          *
  9.          * @return void
  10.          *//**
  11.          * Detach, detach an observer
  12.          *
  13.          * @return boolean
  14.          *//**
  15.  * Any object that wishes to be notified when the state of another object changes
  16.  *
  17.  * @package Interface
  18.  * @version $Id$
  19.  *//**
  20.          * Update, called by the observable on specific events
  21.          *
  22.          * @param object Observable implements Observable_Interface
  23.          * @param string Event, for example: "onBeforeAdd", "onBeforeAfter", "onAdd"
  24.          * @param mixed Data, optional data that can’t be retrieved directly from the Observable
  25.          * @return void
  26.          *//**
  27.  * Order class, handles adding, inserting, updating and deleting orders
  28.  *
  29.  * @package Shop
  30.  */// Order statuses
  31. /**
  32.          * OrderRef
  33.          *
  34.          * @var int $iOrderRef
  35.          *//**
  36.          * Status
  37.          *
  38.          * @var int $iStatus
  39.          *//**
  40.          * List of attached observers
  41.          *
  42.          * @var array
  43.          *//**
  44.          * Constructor
  45.          *
  46.          * @param integer $iOrderRef
  47.          */‘Orderref should be of type integer type "%s" is given’// Get order information from the database or something else…
  48. /**
  49.          * Attach an observer
  50.          *
  51.          * @param Observer_Interface $oObserver
  52.          * @return void
  53.          */‘Observer is already attached’/**
  54.          * Detach observer
  55.          *
  56.          * @param Observer_Interface $oObserver
  57.          * @return void
  58.          */‘Observer not attached’/**
  59.          * Notify the attached observers
  60.          *
  61.          * @param string $sEvent, name of the event
  62.          * @param mixed $mData, optional data that is not directly available for the observers
  63.          * @return void
  64.          *//**
  65.          * Add an order
  66.          *
  67.          * @param array $aOrder
  68.          * @return void
  69.          */‘onAdd’);
  70.         }
  71.        
  72.         /**
  73.          * Return the order reference number
  74.          *
  75.          * @return int
  76.          *//**
  77.          * Return the current order status
  78.          *
  79.          * @return int
  80.          *//**
  81.          * Update the order status
  82.          */‘onBeforeUpdateStatus’);
  83.                 // …
  84. // …
  85. ‘onAfterUpdateStatus’);
  86.         }
  87. }
  88.  
  89. /**
  90.  * Order status handler, observer that sends an email to secretary
  91.  * if the status of an order changes from shipped to delivered, so the
  92.  * secratary can make a phone call to our customer to ask for his opinion about the service
  93.  *
  94.  * @package Shop
  95.  *//**
  96.          * Update, called by the observable object order
  97.          *
  98.          * @param Observable_Interface $oObservable
  99.          * @param string $sEvent
  100.          * @param mixed $mData
  101.          * @return void
  102.          */‘onBeforeUpdateStatus’‘onAfterUpdateStatus’‘Order number %d is shipped’, $oObservable->getRef());
  103.                                         //mail(‘secratary@example.com’, ‘Order number %d is shipped’, ‘Text’);
  104. ‘Mail sended to the secratary to help her remember to call our customer for a survey.’

Now we are able to take action on different events that occur.

Disadvantages
Although this implementation works quite well there are some drawbacks. One of those drawbacks is that we need to dispatch an event in our framework, if we don’t programmers can’t hook into our application. Triggering events everywhere give us a small performance penalty however I do think this way of working gives the programmers a nice way to hook into your application on those spots that you want them to hook in.

Just for the record
Notice that this code is just an example and can still use some improvements, for example: each observer is initialized even it will maybe never be notified, therefore I suggest to make use of lazy in some cases for loading the objects. There are other systems to hook into an application, more to follow!

Written by Sjoerd Maessen

May 23rd, 2011 at 8:02 pm

Posted in API

Tagged with , , ,

5 Responses to 'PHP hook, building hooks in your application'

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  1. Hi Sjoerd,

    Looks good, nice way to use the SPL libraries.

    Cheers

    RobT

    24 May 11 at 7:47 am

  2. Oh yeah, I built a similar example without a real observer pattern which looks more like the evenlistener setup using in languages like Flex

    have a look at :

    http://sourcerer.nl/eventhandlers.phps

    RobT

    24 May 11 at 9:26 am

  3. Thx @RobT, your eventlistener example does indeed resembles a lot the way it works in Flex. Thx for contributing.

    Sjoerd Maessen

    24 May 11 at 9:45 am

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