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extension_loaded

Description

The extension_loaded of Options / Information for PHP finds 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 · extension

<?

$extension = "zip";

$return = extension_loaded($extension)

var_export($return);

2
<?

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