PHP class automatic loading, chain operation, magic method implementation code_php skills

墨辰丷
Release: 2023-03-26 18:46:02
Original
1538 people have browsed it

这篇文章主要介绍了php类自动装载、链式操作、魔术方法,需要的朋友可以参考下

1、自动装载实例

目录下有3个文件:index.php load.php tests文件夹

tests文件夹里有 test1.php

<?php
namespace Tests;
class Test1{
  static function test(){
    echo __CLASS__.&#39;<br>&#39;;
    echo __FILE__.&#39;<br>&#39;;
  }
}
Copy after login

index.php内容

<?php
include "load.php";
Tests\Test1::test();
Copy after login

load.php内容

<?php
class Loader
{
  static function loadClass($class)
  {
    $class =  __DIR__.DIRECTORY_SEPARATOR.str_replace(&#39;\\&#39;,&#39;/&#39;,$class).&#39;.php&#39;;
    if (file_exists($class)) {
      include $class;
      return;
    }
  }
}
spl_autoload_register(array(&#39;Loader&#39;,&#39;loadClass&#39;));
Copy after login

2、php 链式操作

namespace Baobab;

class Database{
 function where($where){
  return $this;
 }
 
 function order($order) {
  return $this;
 }
 
 function limit($limit){
  return $this;
 }
}

?>

//index.php
$db = new Baobab\Database();
$db->where(&#39;id = 1&#39;)->order(&#39;order by id&#39;)->limit(1);
Copy after login

3、魔术方法:

__get/__set:接管对象属性。在给不可访问属性赋值时,

__set() 会被调用;读取不可访问属性的值时,__get() 会被调用。

__call/__callStatic:在对象中调用一个不可访问方法时,__call() 会被调用;用静态方式中调用一个不可访问方法时,__callStatic() 会被调用。

__toString:一个类转化成字符串

__invoke:以调用函数的方式调用一个对象时,__invoke() 方法会被自动调用。

<?php
namespace Baobab;

class Object{
 protected $array = array();
 function __set($key, $value){
  $this->array[$key] = $value;
 }
 function __get($key){
  //echo __METHOD__;
  return $this->array[$key];
 }
 
 function __call($func, $param){
  //var_dump($func,$param);
  return &#39;magic function&#39;;
 }
 
 static function __callstatic($func, $param) {
  //var_dump($func, $param);
  return &#39;magic static function&#39;;
 }
 
 function __toString(){
  return __CLASS__;
 }
 
 function __invoke($param) {
  return var_dump($param);
 }
 
}
Copy after login

$obj = new baobab\Object();
$obj->title = &#39;hello&#39;;
echo $obj->title;
echo $obj->test1(&#39;hello&#39;, 123);
echo $obj::test1(&#39;hello1&#39;, 1234);
echo $obj;
echo $obj(&#39;test1&#39;);
Copy after login

相关推荐:

PHP魔术方法之__call与__callStatic如何使用

php魔术方法

php魔术常量介绍和魔术函数使用代码说明总结

The above is the detailed content of PHP class automatic loading, chain operation, magic method implementation code_php skills. For more information, please follow other related articles on the PHP Chinese website!

Related labels:
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