extension_loaded

Find out whether an extension is loaded

Syntax

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

Returns true if the extension identified by extension is loaded, false otherwise.

Examples

1

<?

if(!extension_loaded('gd'))
{
    if(!dl('gd.so'))
    {
        exit;
    }
}

?>
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