Home php教程 php手册 php函数call_user_func和call_user_func_array

php函数call_user_func和call_user_func_array

Jun 13, 2016 am 11:18 AM
arr array php user function and Tutorial

 

php教程函数call_user_func和call_user_func_array
call_user_func函数类似于一种特别的调用函数的方法,使用方法如下:
function a($b,$c)
{
echo $b;
echo $c;
}
call_user_func('a', "111","222");
call_user_func('a', "333","444");
//显示 111 222 333 444
?>

调用类内部的方法比较奇怪,居然用的是array,不知道开发者是如何考虑的,当然省去了new,也是满有新意的:
class a {
function b($c)
{
echo $c;
}
}
call_user_func(array("a", "b"),"111");
//显示 111
?>

call_user_func_array函数和call_user_func很相似,只不过是换了一种方式传递了参数,让参数的结构更清晰:
function a($b, $c)
{
echo $b;
echo $c;

}
call_user_func_array('a', array("111", "222"));
//显示 111 222
?>

call_user_func_array函数也可以调用类内部的方法的

Class ClassA
{

function bc($b, $c) {
     $bc = $b + $c;
echo $bc;
}
}
call_user_func_array(array('ClassA','bc'), array("111", "222"));

//显示 333
?>

call_user_func函数和call_user_func_array函数都支持引用,这让他们和普通的函数调用更趋于功能一致:
function a(&$b)
{
$b++;
}
$c = 0;
call_user_func('a', &$c);
echo $c;//显示 1
call_user_func_array('a', array(&$c));
echo $c;//显示 2

 

php之call_user_func_array的简易用法
今天在群里面,有个叫lewis的在问call_user_func_array的用法,因为之前一直没有用过,也不能说什么,于是看一下手册,发现是这么写的:

call_user_func_array
(PHP 4 >= 4.0.4, PHP 5)

call_user_func_array -- Call a user function given with an array of parameters
Description
mixed call_user_func_array ( callback function, array param_arr )


Call a user defined function given by function, with the parameters in param_arr.
然后还有一个例子:

 

相信看了例子之后应该有点明白了吧?


Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot Article Tags

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian

CakePHP Date and Time CakePHP Date and Time Sep 10, 2024 pm 05:27 PM

CakePHP Date and Time

CakePHP Project Configuration CakePHP Project Configuration Sep 10, 2024 pm 05:25 PM

CakePHP Project Configuration

CakePHP File upload CakePHP File upload Sep 10, 2024 pm 05:27 PM

CakePHP File upload

CakePHP Routing CakePHP Routing Sep 10, 2024 pm 05:25 PM

CakePHP Routing

Discuss CakePHP Discuss CakePHP Sep 10, 2024 pm 05:28 PM

Discuss CakePHP

CakePHP Quick Guide CakePHP Quick Guide Sep 10, 2024 pm 05:27 PM

CakePHP Quick Guide

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

How To Set Up Visual Studio Code (VS Code) for PHP Development

See all articles