PHP ReflectionMethod getClosure()用法及代碼示例

ReflectionMethod::getClosure()函數是PHP中的一個內置函數，用於為該方法返回動態創建的閉包，否則，在出現錯誤的情況下返回NULL。

用法:

Closure ReflectionMethod::getClosure ( $object )

參數：該函數接受參數對象，該參數對象是指定的user-defiend類對象。

返回值：該函數為該方法返回一個動態創建的閉包，否則，在發生錯誤的情況下返回NULL。

以下示例程序旨在說明PHP中的ReflectionMethod::getClosure()函數：
程序_1：

<?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); 
?>

輸出：

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

程序_2：

<?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())); 
?>

輸出：

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>"
  }
}

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

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注：本文由純淨天空篩選整理自Kanchan_Ray大神的英文原創作品 PHP | ReflectionMethod getClosure() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。