PHP 忒聊 綴豖 梒 25. Extension Possibilities ヶ輛 Built-in Modules Built-in modules are compiled directly into PHP and carried around with every PHP process; their functionality is instantly available to every script that's being run. Like external modules, built-in modules have advantages and disadvantages, as described in the following table: Advantages Disadvantages No need to load the module specifically; the functionality is instantly available. Changes to built-in modules require recompiling of PHP. No external files clutter up the disk; everything resides in the PHP binary. The PHP binary grows and consumes more memory. 綴豖 れ萸 ヶ輛 Extension Possibilities 奻珨撰 The Zend Engine