Home php教程 php手册 php 类中的各种拦截器

php 类中的各种拦截器

Jun 06, 2016 pm 07:54 PM
get php property intercept not yet access

1、__get( $property ) 访问未定义的属性时调用 class lanjie{ function __get($name) { echo $name. property not found! ; }}$ob = new lanjie();echo $ob-g; 当我们调用对象$ob未定义的属性g时,调用拦截器__get()方法,输出“g property not found!”;

1、__get( $property ) 访问未定义的属性时调用

 


 

class lanjie
{
    function __get($name)
    {
        echo $name." property not found! ";
    }
}


$ob = new lanjie();
echo $ob->g;
Copy after login



当我们调用对象$ob未定义的属性g时,调用拦截器__get()方法,输出“g property not found!”;

 

 

 


2、__set( $property , $value ) 给未定义的属性调用时赋值

 


 

class person
{
    private $_age;
    private $_name;
    function __set($name, $value)
    {
        $method = "set".  ucfirst($name);
        echo $method;
        if(method_exists($this, $method) )
        {
            return $this->$method( $value );
        }
    }
    
    function setName( $name )
    {
        $this->_name = $name;
        if( !is_null($this->_name) )
        {
            $this->_name = strtoupper($this->_name);
        }
    }
    function setAge( $age )
    {
        return $this->_age = (int)$age;
    }
}

$p = new person();
$p->name = 'bob';
print_r( array( $p ) );
Copy after login


这里我们可以很清楚的看到 , 当给未定义的‘name’赋值时 ,  会调用“__set()”


其他的还有 __call(), __isset() , __unset();

这里最有用和最常用的的是__call() , 当调用一个为存在的方法时被调用; __isset()是在对一个为定义的属性使用isset()函数时被调用, __unset是在对未定义的数以使用unset时被调用

 

http://blog.csdn.net/shuiping567541/article/details/7061258

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 AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

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)

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

In this chapter, we will understand the Environment Variables, General Configuration, Database Configuration and Email Configuration in CakePHP.

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 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

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

To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.

CakePHP Working with Database CakePHP Working with Database Sep 10, 2024 pm 05:25 PM

Working with database in CakePHP is very easy. We will understand the CRUD (Create, Read, Update, Delete) operations in this chapter.

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

To work on file upload we are going to use the form helper. Here, is an example for file upload.

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

In this chapter, we are going to learn the following topics related to routing ?

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

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

CakePHP Creating Validators CakePHP Creating Validators Sep 10, 2024 pm 05:26 PM

Validator can be created by adding the following two lines in the controller.

See all articles