PHP caches

PHP is a scripting language. Each time a PHP script is run to generate a webpage with Drupal, your web server must compile the PHP script into an executable format. This results in an obvious amount of overhead each time a page is generated.

A PHP cache can be installed to save and re-use compiled PHP scripts, thus greatly reducing the amount of overhead required for Drupal to display a web page.

There are a number of PHP caches (aka accelerators) available, including:

• PHP Accelerator
• After Burner
• Zend Accelerator