__call和__callStatic不能正常工作或写入错误

Question

<?php 
    class Statics { 

     private static $keyword; 

     public static function __callStatic($name,$args){ 
      self::$keyword = "google"; 
     } 
     public static function TellMe(){ 
      echo self::$keyword; 
     } 
    } 

    Statics::TellMe(); 

这是一个简单的故障我用__construct试过，但我写的代码Statics::TellMe();的方式，我需要写new为__construct工作。而我的私有静态变量keyword不会被写入没有被称为任何想法，为什么这是行不通的？

IDE Not Working Example

private static $pathname; 
    public function __construct($dir = "") 
    { 
     set_include_path(dirname($_SERVER["DOCUMENT_ROOT"])); 
     if($dir !== "") { 
      $dir = "/".$dir; 
     } 
     self::$pathname = $dir.".htaccess"; 
     if(file_exists(self::$pathname)) { 
      self::$htaccess = file_get_contents($dir.".htaccess",true); 
      self::$htaccess_array = explode("\n",self::$htaccess); 
     } 
    } 

的self::$patname是没有得到分配，因为我没有做$key = new Key();，所以我需要一种方法来做到这一点，如果我只是做Key::get()或类似的东西。

Answer 1

你的方式__callStatic正在工作中有一个误解。 当静态方法不知道类时，神奇方法__callStatic将像后备方法一样工作。

class Statics { 

    private static $keyword; 

    public static function __callStatic($name,$args){ 
     return 'I am '.$name.' and I am called with the arguments : '.implode(','$args); 
    } 
    public static function TellMe(){ 
     return 'I am TellMe'; 
    } 
} 

echo Statics::TellMe(); // print I am TellMe 
echo Statics::TellThem(); // print I am TellThem and I am called with the arguments : 
echo Statics::TellEveryOne('I','love','them'); // print I am TellEveryOne and I am called with the arguments : I, love, them 

所以你的情况，你可以做的是：

class Statics { 

    private static $keyword; 

    public static function __callStatic($name,$args){ 
     self::$keyword = "google"; 
     return self::$keyword; 
    } 
} 

echo Statics::TellMe(); 

根据您的编辑：

class Statics{ 
    private static $pathname; 
    private static $dir; 

    public function getPathName($dir = "") 
    // OR public function getPathName($dir = null) 
    { 
     if($dir !== self::$dir || self::$pathname === ''){ 
     // OR if($dir !== null || self::$pathname === ''){ -> this way if you do getPathName() a second time, you don't have to pass the param $dir again 
      self::$dir = $dir; 
      set_include_path(dirname($_SERVER["DOCUMENT_ROOT"])); 
      if($dir !== "") { 
       $dir = "/".$dir; 
      } 
      self::$pathname = $dir.".htaccess"; 
      if(file_exists(self::$pathname)) { 
       self::$htaccess = file_get_contents($dir.".htaccess",true); 
       self::$htaccess_array = explode("\n",self::$htaccess); 
      } 
     } 
     return self::$pathname; 
    } 
} 

echo Statics::getPathName('some');