PHP 5.5.17 is available

extension_loaded

(PHP 4, PHP 5)

extension_loadedFind out whether an extension is loaded

Description

bool extension_loaded ( string $name )

Finds out whether the extension is loaded.

Parameters

name

The extension name. This parameter is case-insensitive.

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]

Return Values

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

Examples

Example #1 extension_loaded() example

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

See Also

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