How to use the __callStatic function in php

This situation is especially common in larave, but during the development process it is obvious that some of these are not static. For example, if you use a model User, then every time you instantiate it, it will be a brand new one and will not affect each other. A magic method __callStatic is used here.

For example:

<?php
class Test{
    public function __call($name, $arguments)
    {
        echo &#39;this is __call&#39;. PHP_EOL;
    }

    public static function __callStatic($name, $arguments)
    {
        echo &#39;this is __callStatic:&#39;. PHP_EOL;
    }
}

$test = new Test();
$test->hello();
$test::hi();
//this is __call:hello
//this is __callStatic:hi

Of course, the magic method is also a very performance-intensive method. Every time it is called, scan the class first. It will be called only when a method is found, and this method can also be of great help for the neatness and abstraction of the code. There must be a trade-off between this.

The log class implemented below uses this A method, decouple the method, and you can call it as long as it meets the specified interface

<?php

class Test{
    //获取 logger 的实体
    private static $logger;

    public static function getLogger(){
        return self::$logger?: self::$logger = self::createLogger();
    }

    private static function createLogger(){
        return new Logger();
    }

    public static function setLogger(LoggerInterface $logger){
        self::$logger = $logger;
    }


    public function __call($name, $arguments)
    {
        call_user_func_array([self::getLogger(),$name],$arguments);
    }

    public static function __callStatic($name, $arguments)
    {
        forward_static_call_array([self::getLogger(),$name],$arguments);
    }
}

interface LoggerInterface{
    function info($message,array $content = []);
    function alert($messge,array $content = []);
}

class Logger implements LoggerInterface {
    function info($message, array $content = [])
    {
        echo &#39;this is Log method info&#39; . PHP_EOL;
        var_dump($content);
    }

    function alert($messge, array $content = [])
    {
        echo &#39;this is Log method alert: &#39;. $messge . PHP_EOL;
    }
}


Test::info(&#39;喊个口号:&#39;,[&#39;好好&#39;,&#39;学习&#39;,&#39;天天&#39;,&#39;向上&#39;]);
$test = new Test();
$test->alert(&#39;hello&#39;);

Output:

this is Log method info
array(4) {
  [0]=>
  string(6) "好好"
  [1]=>
  string(6) "学习"
  [2]=>
  string(6) "天天"
  [3]=>
  string(6) "向上"
}
this is Log method alert: hello

Recommended learning:php video tutorial

The above is the detailed content of How to use the __callStatic function in php. For more information, please follow other related articles on the PHP Chinese website!