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PHP | ReflectionClass isUserDefined() Function

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  • Last Updated : 19 Feb, 2021
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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);
?>


Output: 
 

bool(false)

Reference: https://www.php.net/manual/en/reflectionclass.isuserdefined.php
 

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