php - Return reference to static variable from __callStatic? -

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i'm trying find workaround static variables not being copied on extending classes (which doesn't play nicely late static binding), here thought might work, gives me "php fatal error: can't use function return value in write context" :

<?php  class person {     protected static $tlsb_names = ['name'];     protected static $tlsb_vars  = [];      public static function & __callstatic($method,$args)     {         echo "call static " . $method . " on " . get_called_class() . "\n";         if(in_array($method,static::$tlsb_names))         {             if(!array_key_exists(get_called_class(),static::$tlsb_vars))             {                 static::$tlsb_vars[get_called_class()] = [];             }             if(!array_key_exists($method, static::$tlsb_vars[get_called_class()]))             {                 echo "set var $method " . get_called_class() . "\n";                 static::$tlsb_vars[get_called_class()] = null;             }             return static::$tlsb_vars[get_called_class()][$method];         }     }      public static function show_name()     {         static::name() . "\n";     }      public static function call_me_al()     {         static::name() = "al";     }      public static function call_me_joe()     {         static::name() = "joe";     }    }  class al extends person{} class joe extends person{}  al::call_me_al(); joe::call_me_joe();  al::show_name(); joe::show_name();

the problematic part lines :

public static function call_me_al() {     static::name() = "al"; }

apparently compile-time error since non of echo's run.

what doing wrong here?

the following line of code wrong:

public static function & __callstatic($method,$args)

you need match the definition of __callstatic functiondocs , without return reference:

public static function __callstatic($name, $arguments)

so try achieve not possible.

and other problem circle around should able solve late static binding (lsb)docs.

also keep in mind magic hard debug, step-debugger ready , step through application can better understand happen. debugger in php called xdebug, php ides , editors support it.


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