PHP - Function class_exists()

Syntax

class_exists ( $class_name [,$autoload] );

Definition and Usage

This function checks if the given class have been defined. Returns TRUE if class_name is a defined class, FALSE otherwise.

Parameters

Return Value

It returns TRUE if class_name is a defined class, FALSE otherwise.

Example

Following is the usage of this function −

<?php
   if (class_exists('HelloWorld')) {
      $helloworld = new HelloWorld();
   }
?>