PHP | ReflectionClass isUserDefined() Function

Last Updated : 19 Feb, 2021

The ReflectionClass::isUserDefined() function is an inbuilt function in PHP which is used to check if any user-defined class is available or not.
Syntax:

bool ReflectionClass::isUserDefined()

Parameters: This function does not accept any parameter.
Return Value: This function returns TRUE if the user-defined class is available, otherwise FALSE.
Below programs illustrate the ReflectionClass::isUserDefined() function in PHP:
Program 1:

php

<?php
 
// Defining user-defined class Company
Class Company {
    public function GeeksforGeeks() {
    }
}
 
// Using ReflectionClass over the
// defined class 
$obj=new ReflectionClass('Company');
 
// Calling the isUserDefined() function
$A = $obj->isUserDefined();
 
// Getting the value true or false
var_dump($A); 
?>

Output:

bool(true)

Program 2:

php

<?php
 
// Using a internal class 'ReflectionClass'
$obj=new ReflectionClass('ReflectionClass');
 
// Calling the isUserDefined() function
$A = $obj->isUserDefined();
 
// Getting the value true or false
var_dump($A); 
?>