php中的__callStatic函数如何使用

举个栗子:

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

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

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

当然魔术方法也是很耗性能的一种方式,每次调用的时候后回先扫一遍class没找到方法时才会调用它,而为了代码的整洁和抽象这个方法也能给很大的帮助,在这之间去要有个权衡

下面实现的 log 类,采用的就是这种方法,将方法解耦出来,只要符合规定的接口就能调用

<?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 $content = [])
    {
        echo 'this is Log method info' . PHP_EOL;
        var_dump($content);
    }

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


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

输出:

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

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