extension_loaded
(PHP 4, PHP 5, PHP 7, PHP 8)
extension_loaded — Find out whether an extension is loaded
Description
function extension_loaded(
string $extension):
bool
Parameters
extension-
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 extension
is loaded, false otherwise.
Examples
Example #1 extension_loaded() example
<?php
if (!extension_loaded('gd')) {
if (!dl('gd.so')) {
exit;
}
}
?>
dl
PHP Options/Info Functions