PHP

PHP Tag Archive

Cracking PHP rand()

Sjoerd Langkemper writes about Cracking PHP rand(): Webapps occasionaly need to create tokens that are hard to guess. For example for session tokens or CSRF tokens, or in forgot password functionality where you get a token mailed to reset your password. These tokens should be cryptographically secure, but are often made by calling rand() multiple …

Cracking PHP rand() Read More »

How to add conditional analytics tracking code in WordPress Multisite

In my WordPress multisite, I use one theme for three sites and a tracking code for analytics on my websites. Whether it is Google Analytics or Piwik doesn’t matter. Here is how you can conditionally add tracking codes to your WordPress Multisite: Use a condition in functions.php to add the tracking code for Piwik/Matomo Analytics …

How to add conditional analytics tracking code in WordPress Multisite Read More »

Convert PHP ext/mysql to MySQLi

This post will show you how to convert PHP mysql extension functions to PHP MySQLi extension. Migrating away from ext/mysql to MySQLi (or PHP Data Object (PDO)) is important, because the ext/mysql functions are deprecated as of PHP 5.5.0. If you do not update your PHP code, your website will fail soon!

How to set a good PHP realpath_cache_size

The PHP directive realpath_cache_size sets the size of the realpath cache to be used by PHP. Increasing realpath_cache_size might greatly improve PHP performance, as PHP states: “this value should be increased on systems where PHP opens many files.” Setting a correct value for PHP realpath_cache_size can greatly improve PHP performance and optimize WordPress – and …

How to set a good PHP realpath_cache_size Read More »