The extension_loaded Function

The extension_loaded function checks whether the specified extension is loaded in the current PHP configuration. The function takes a string with the extension name as a parameter and returns true if the extension is active, or false if it is not loaded.

Syntax

extension_loaded(string $extension): bool

Example

Let's check if the "json" extension is loaded:

<?php
	$res = extension_loaded('json');
	var_dump($res);
?>

Code execution result:

true

Example

Let's check the availability of the "gd" extension:

<?php
	if (extension_loaded('gd')) {
		echo 'GD extension is loaded';
	} else {
		echo 'GD extension is NOT loaded';
	}
?>

Code execution result:

'GD extension is loaded'

The extension_loaded Function

Syntax

Example

Example

See Also