PHP | ReflectionMethod getClosure() Function

The ReflectionMethod::getClosure() function is an inbuilt function in PHP which is used to return a dynamically created closure for the method otherwise, return NULL in case of an error.

Syntax:

Closure ReflectionMethod::getClosure ( $object )

Parameters: This function accepts a parameter object which is the specified user-defined class object.

Return Value: This function returns a dynamically created closure for the method otherwise, return NULL in case of an error.

Below programs illustrate the ReflectionMethod::getClosure() function in PHP: 

Program_1:

PHP

<?php

// Initializing a user-defined class
class Company {

    protected function GeeksforGeeks($name) {
        return 'GFG' . $name;
    }
}

// Using ReflectionMethod() over the class Company
$A = new ReflectionMethod('Company', 'GeeksforGeeks');

// Calling the getClosure() function
$B = $A->getClosure(new Company());

// Getting a dynamically created closure
// for the method otherwise, return NULL
// in case of an error.
var_dump($B);
?>

Output:

object(Closure)#3 (2) {
  ["this"]=>
  object(Company)#2 (0) {
  }
  ["parameter"]=>
  array(1) {
    ["$name"]=>
    string(10) "<required>"
  }
}

Program_2:

PHP

<?php
 
// Initializing some user-defined classes
class Department1 {
 
    protected function HR($name) {
        return 'hr' . $name;
    }
}
class Department2 {
 
    protected function Coding($name) {
        return 'coding' . $name;
    }
}
class Department3 {
 
    protected function Marketing($name) {
        return 'marketing' . $name;
    }
}
 
// Using ReflectionMethod() over the above classes
$A = new ReflectionMethod('Department1', 'HR');
$B = new ReflectionMethod('Department2', 'Coding');
$C = new ReflectionMethod('Department3', 'Marketing');
 
// Calling the getClosure() function and 
// Getting a dynamically created closure
// for the method otherwise, return NULL
// in case of an error.
var_dump($A->getClosure(new Department1()));
var_dump($B->getClosure(new Department2()));
var_dump($C->getClosure(new Department3()));
?>

Output:

object(Closure)#5 (2) {
  ["this"]=>
  object(Department1)#4 (0) {
  }
  ["parameter"]=>
  array(1) {
    ["$name"]=>
    string(10) "<required>"
  }
}
object(Closure)#4 (2) {
  ["this"]=>
  object(Department2)#5 (0) {
  }
  ["parameter"]=>
  array(1) {
    ["$name"]=>
    string(10) "<required>"
  }
}
object(Closure)#5 (2) {
  ["this"]=>
  object(Department3)#4 (0) {
  }
  ["parameter"]=>
  array(1) {
    ["$name"]=>
    string(10) "<required>"
  }
}

Reference: https://www.php.net/manual/en/reflectionmethod.getclosure.php

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