PHP | ReflectionClass isUserDefined() Function

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:

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

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Output:

bool(true)

Program 2:

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<?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); 
?>

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Output:

bool(false)

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



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