Php/docs/function.extension-loaded

• PHP Manual
• PHP Options/Info Functions
• Find out whether an extension is loaded

extension_loaded

(PHP 4, PHP 5, PHP 7)

extension_loaded — Find out whether an extension is loaded

Description

extension_loaded ( string $name ) : bool

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

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

See Also

• 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() - Return TRUE if the given function has been defined