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Subject: Workaround for inability to know calling class inside an inherited method?
From: jalonso@art3mis.com ("Juan Alonso")
Message-ID: <php.internals-9568@news.php.net>

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If a class inherits a method from a parent function and you call the parent
method from the inherited class you cannot refer to variables referred in
the inherited class. Is there a language construct to refer to the calling
class inside a method?

 

The example will explain it better:

 

<?php

class db

{

  static function query()

  {

    echo self::$connString;

  }

}

 

class dbOne extends db

{

  protected $connString = 'host=localhost blablla';

}

 

echo dbOne::query();

?>

 

And it generates:

 

Fatal error: Access to undeclared static property: db::$connString in
/var/dev/jalonso.gea/app/db_new.php on line 6

 

I know this has been brought before but I don't remember if there is any
workaround besides redefining the method in the inherited class and passing
the parent class it's name, which is what I am doing currently:

 

<?php

class db

{

  static function query($connString)

  {

    echo $connString;

  }

}

 

class dbOne extends db

{

  protected $connString = 'host=localhost blablla';

 

  static function query()

  {

    return parent::query(self::$connString);

  }

}

 

echo dbOne::query();

?>

 

 

Regards,

 

Juan Alonso


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