extension_loaded
PHP 4, PHP 5, PHP 7, PHP 8
extension_loaded - Find out whether an extension is loaded
Manual
extension_loaded(
string$extension ): bool
Finds out whether the extension is loaded.
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.