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# extension_loaded

(PHP 4, PHP 5)

extension_loaded — Find out whether an extension is loaded

### 설명

bool extension_loaded ( string `$name` )

Finds out whether the extension is loaded.

### 인수

`name`

  The extension name.

  You can see the names of various extensions by using phpinfo() or if you're using the CGI or CLI version of PHP you can use the -m switch to list all available extensions:

      $ php -m
      [PHP Modules]
      xml
      tokenizer
      standard
      sockets
      session
      posix
      pcre
      overload
      mysql
      mbstring
      ctype

      [Zend Modules]

### 반환값

Returns `TRUE` if the extension identified by `name` is loaded, `FALSE` otherwise.

### 예제

Example #1 extension_loaded() example

`<?php
if (!extension_loaded('gd')) {
if (!dl('gd.so')) {
exit;
}
}
?>`

### 주의

> Note: extension_loaded() uses the internal extension name to test whether a certain extension is available or not. Most internal extension names are written in lower case but there may be extension available which also use uppercase letters. Be warned that this function compares case sensitive !

### 참고

- get_loaded_extensions() - 적재된 모든 모듈명을 배열로 반환합니다
- get_extension_funcs() - 모듈 함수명을 배열로 반환
- phpinfo() - Outputs lots of PHP information
- dl() - Loads a PHP extension at runtime

dl
gc_collect_cycles
PHP Options/Info 함수 목록
PHP Manual