(PHP 5 >= 5.0.2, PHP 7)
interface_exists — Checks if the interface has been defined
interface_exists ( string $interface_name [, bool $autoload = true ] ) : bool
Checks if the given interface has been defined.
interface_name
The interface name
autoload
Whether to call __autoload or not by default.
Returns true if the interface given by interface_name has been defined, false otherwise.
Example #1 interface_exists() example
<?php
// Check the interface exists before trying to use it
if (interface_exists('MyInterface')) {
class MyClass implements MyInterface
{
// Methods
}
}
?>
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https://www.php.net/manual/en/function.interface-exists.php