>PHP: get_class

DescripciÃ³n

string get_class ( [object obj] )

Esta funciÃ³n devuelve el nombre de la clase de la cual el objeto obj es una instancia. Devuelve FALSE si obj no es un objeto.

Nota: Una clase definida en una extensiÃ³n PHP es devuelta en su notaciÃ³n original. En PHP 4 get_class() devuelve un nombre de clase definido por el usuario en minÃºsculas, pero en PHP devolverÃ¡ el nombre de la clase en su notaciÃ³n original tambiÃ©n, al igual que con los nombres de clase de las extensiones PHP.

Nota: A partir de PHP 5, obj es opcional si se llama desde el mÃ©todo del objeto.

Ejemplo 1. Uso de get_class()

<?php class foo { function foo() { // implementa alguna logica } function nombre() { echo "Mi nombre es " , get_class($this) , "\n"; } } // crear un objeto $bar = new foo(); // llamada externa echo "Su nombre es " , get_class($bar) , "\n"; // llamada interna $bar->nombre(); ?>
El resultado del ejemplo seria:
Su nombre es foo Mi nombre es foo

Vea tambiÃ©n get_parent_class(), gettype(), e is_subclass_of().

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get_class

benjaminhill at gmail dot com
27-Apr-2006 10:47


More funkyness:



class Parent {

   function displayTableName() {

      echo get_class($this);

      echo get_class();

   }

}



class Child {

   function __construct() {

      $this->displayTableName();

   }

}



Will return 

- Child

- Parent



So when they say "the object isn't required in PHP5" - they don't really mean it.

brjann at NOSPAMATALLgmail dot com
16-Nov-2005 12:39


This behavior is unexpected, but good to be aware of



class parentclass {

    public function getClass(){

        echo get_class($this); //using "$this"

    }

}

class child extends parentclass {

}



$obj = new child();

$obj->getClass(); //outputs "child"



class parentclass {

    public function getClass(){

        echo get_class(); //note, no "$this"

    }

}

class child extends parentclass {

}



$obj = new child();

$obj->getClass(); //outputs "parentclass"

davidc at php dot net
13-Oct-2005 10:25


As of php5, you cannot use get_class($this); in a public static function. You would have to do something like this:



<?php



class BooBoof {

    public static function getclass()

    {

        return __CLASS__;

    }

}



$c = BooBoof::getclass();

print $c;

?>



To get the class since you cannot use

<?php

public static function getclass()

{

    return get_class($this);

}

?>



Rather simple and straightforward but that might help some people that are searching for it..

wired at evd dot ru
25-Sep-2005 02:25


There is one unexpected bahaviour (for me as least):



<?php



  class parent

  {

    ...



    public function getInstance ($id)

    {

      ...



      print get_class() . "\n" . __CLASS__;



      ...

    }

  }



  class child extends parent

  {

    ...

  }



  child::getInstance(...);

?>



This code will produce:



  parent

  parent



So I can't make "new $className(...)" in getInstance(). The only option is to do a fabric.

kunxin at creaion dot com
25-Jul-2005 05:30


I just migrated from PHP 4 to PHP 5 and noticed that in PHP 5.03 that a lot of code dependent on get_class() and its variants stop working.



It turns out that get_class() and its variants are now case-sensitive.

refrozen dot com
05-Jul-2005 03:01


philip at cornado dot com, it returns the value of the class from which it was called, rather than the instance's name... causing inheritance to result in unexpected returns

MagicalTux at FF.ST
02-Feb-2004 04:11


Note that the constant __CLASS__ is different from get_class($this) :

<?

  class test {

    function whoami() {

      echo "Hello, I'm whoami 1 !\r\n";

      echo "Value of __CLASS__ : ".__CLASS__."\r\n";

      echo "Value of get_class() : ".get_class($this)."\r\n\r\n";

    }

  }

  class test2 extends test {

    function whoami2() {

      echo "Hello, I'm whoami 2 !\r\n";

      echo "Value of __CLASS__ : ".__CLASS__."\r\n";

      echo "Value of get_class() : ".get_class($this)."\r\n\r\n";

      parent::whoami(); // call parent whoami() function

    }

  }

  $test=new test;

  $test->whoami();

  $test2=new test2;

  $test2->whoami();

  $test2->whoami2();

?>



The output is :

Hello, I'm whoami 1 !

Value of __CLASS__ : test

Value of get_class() : test



Hello, I'm whoami 1 !

Value of __CLASS__ : test

Value of get_class() : test2



Hello, I'm whoami 2 !

Value of __CLASS__ : test2

Value of get_class() : test2



Hello, I'm whoami 1 !

Value of __CLASS__ : test

Value of get_class() : test2



In fact, __CLASS__ returns the name of the class the function is in and get_class($this) returns the name of the class which was created.

Dan
29-Jan-2003 10:00


This function does return the class name in lowercase, but that does not seem to make any difference. The code below, although very sloppy, works fine in all of the following configurations.



PHP 4.2.2 on Windows NT5 with Apache 1.3.24

PHP 4.2.1 in Zend Development Environment on box above

PHP 4.2.3 on Linux RedHat 7.3 with Apache 1.3.27



class TeSt {

   var $a;

   var $b = "Fred";



   // Notice the case difference in the constructor name



   function Test() {

      $classname = get_class($this); // $classname = "test"

      $this->ra = get_class_vars($classname);

   }

}

// Next line also works with Test(), TEST(), or test()

$obj = new TeSt();

print_r($obj->ra);



Result :

   Array

   (

       [a] => 

       [b] => Fred

   )

oliver DOT pliquett @mediagear DOT de
13-Aug-2002 08:07


This function can become _VERY_ helpful if you want to return a new object of the same type. See this example:



<?php

class Foo{

    var $name;

    

    function Foo( $parameter ){

        $this->name = $parameter;

    }



    function whoami() {

        echo "I'm a " . get_class( $this ) ."\n";

    }

    

    function getNew() {

        $className = get_class( $this );

        

        // here it happens:

        return new $className ( "world" ) ;

    }

}

class Bar extends Foo {



    function Bar( $name ){

        $this->Foo( $name );

    }



    function welcome() {

        echo "Hello, " . $this->name .  "! \n";

    } 

}



// We generate a Bar object:

$myBar = new Bar( "Oliver" );

$myBar->welcome();



//now let's instanciate a new Bar object. 

//note: this method is inherited from Foo by Bar!



$baba = $myBar->getNew();



$baba->welcome();

$baba->whoami();



/* Output: 

Hello, Oliver!

Hello, world!

I'm a bar 

*/

?>

philip at cornado dot com
20-Jun-2002 12:15


As of PHP 4.3.0 the constant __CLASS__ exists and contains the class name.

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MANUAL DE PHP

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get_class

DescripciÃ³n