PHP 5.5.37 is released

extension_loaded

(PHP 4, PHP 5, PHP 7)

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

add a note add a note

User Contributed Notes 1 note

up
0
Marl
2 months ago
The explanation above renders this function useless.
I can check phpinfo() to determine the name of the extension.

If it's in the display that proves that it's loaded.

If not, I might know the dll name (php_printer.dll) but I don't know the name of the extension.
To Top