Find out whether an extension is loaded - Справочник: PHP5.4

Описание

bool extension_loaded ( string $name )

Finds out whether the extension is loaded.

Список параметров

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]

Возвращаемые значения

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

Примеры

Пример #1 extension_loaded() example


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

Список изменений

Версия	Описание
5.0.0	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 extensions available which also use uppercase letters. Prior to PHP 5, this function compared the names case sensitively.

Смотрите также

get_loaded_extensions() - Returns an array with the names of all modules compiled and loaded
get_extension_funcs() - Returns an array with the names of the functions of a module
phpinfo() - Outputs information about PHP's configuration
dl() - Loads a PHP extension at runtime
function_exists() - Возвращает TRUE, если указанная функция определена