Help:PHP config

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Contents 1 Installation 1.1 Compile-time options 2 Opcode caching 3 File Uploads Won't Work if PHP is running in Safe Mode

Installation

http://www.php.net/manual/en/installation.php

Compile-time options

MediaWiki either needs or wants a number of optional features of PHP that need to be enabled at compile time:

• mbstring multibyte character string support (optional; slower custom code will be used if not available)
• iconv character set conversion library (optional; other conversion functions will be used if not available)
• zlib compression library, optionally to compress the file cache
• sockets support for network communication, if using memcached

Opcode caching

If running a high-traffic site, it is highly recommended that a system be used to cache the compiled scripts; there are a number of such plugins for PHP, some free, some proprietary. Wikimedia currently uses Turck MMcache and used to use the ionCube PHP Accelerator. There is Alternative PHP Cache, however we had more problems with it than ionCube.

Fortunately, these all seem to be easy to install as Zend plugins, you just drop in a library and change your php.ini. No fussy recompiling of the entire PHP!

Depending on the cache and options used, you may have to perform a special operation whenever updating script files.

File Uploads Won't Work if PHP is running in Safe Mode

Just so you know.