PHP callback method_PHP tutorial

WBOY
Release: 2016-07-13 17:46:24
Original
1298 people have browsed it

Callback, no need to explain, let’s take a look at how to implement callback in PHP

1. First create an object
class Product{
public $name; //For convenience of testing

function __construct($name){
$this->name=$name;
}
}

2. Use callbacks
class ProcessSale{
private $callbacks;

//Set callback method
function registerCallBack($callback){
If(!is_callable($callback)){
         throw new Exception("xxxxxx");
}

$this->callbacks[]=$callback;
}

function sale($product){
Print "{$product->name}:processing n";

foreach($this->callbacks as $callback){
​​ call_user_func($callback,$product);
}
}
}

3. Test
$logger = function($product){
print "logging ({$product->name})";
}

$processor = new ProcessSale();
$processor->registerCallBack($logger);

$processor->sale(new Product("Test"));

Author: sunwei-07

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/478584.htmlTechArticleCallback, no need to explain, let’s take a look at how to implement callback in PHP 1. First create an object class Product{ public $name; //For the convenience of testing function __construct($name){ $this-name...
source:php.cn
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
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template