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(PHP 5 >= 5.0.2)
interface_exists — Checks if the interface has been defined
Checks if the given interface has been defined.
The interface name
Whether to call __autoload or not by default.
Returns TRUE if the interface given by interface_name has been defined, FALSE otherwise.
Beispiel #1 interface_exists() example
<?php
// Check the interface exists before trying to use it
if (interface_exists('MyInterface')) {
class MyClass implements MyInterface
{
// Methods
}
}
?>
As far as I remember interface_exists() was added in 5.0.2 . In 5.0.0 and 5.0.1 class_exists() used to return TRUE when asked for a existing interface. Starting 5.0.2 class_exists() doesn't do that anymore.
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