PHP: get_declared_classes

Описание

array get_declared_classes ( void )

Эта функция возвращает массив имен классов, объявленных в текущей итерации.

Замечание: Начиная с PHP 4.0.1pl2, три дополнительных класса добавляются в начало списка: stdClass (объявленный в Zend/zend.c), OverloadedTestClass (объявленный в ext/standard/basic_functions.c) и Directory (объявленный в ext/standard/dir.c).
Учтите также, что в зависимости от набора библиотек, собранных с PHP, может варьироваться число дополнительных классов: дополнительные расширения могут объявлять свои классы. Это означает, что вы не сможете использовать имена их классов для своих. Список классов в расширениях находится в разделе Predefined Classes дополнения.

Пример 1. Пример использования get_declared_classes()

<?php print_r(get_declared_classes()); ?>
Пример выведет что-нибудь близкое к:
Array ( [0] => stdClass [1] => __PHP_Incomplete_Class [2] => Directory )

См. также class_exists().

get_declared_classes

matt at mattsoft dot net
21-Dec-2005 02:58


classes can't be unloaded. probably not very practical to implement that in a future version. I wouldn't go out of my way to do it if I were zend. you're better off finding a workaround. it's better programming technique to find a way around having to do that anyway.



http://www.zend.com/zend/week/week223.php#Heading10

22-Mar-2005 09:16


Regarding note of 3-21:



<?php



class myclass {}



$class = 'myclass';

$instance = new $class();



?>



This function could also be used to determine the names of classes defined in a particular file by calling it before and after include. It's hardly a pointless function.

matt-php at DONT-SPAM-ME dot bitdifferent dot com
01-Nov-2004 07:41


The array returned by this function will be in the order the classes were defined / included / required and this order does not appear to change.



For example:



<?PHP



//define classone

class classone { }



//define classtwo

class classtwo { }



//This will show X classes (built-ins, extensions etc) with

//classone and classtwo as the last two elements



print_r(get_declared_classes());



//define classthree

class classthree { }



//...and four

class classfour { }



//Shows the same result as before with class three and four appended

print_r(get_declared_classes());



?>



Output:



Array

( 

   [0] => stdClass

   [1] .... other defined classes....

   [10] => classone

   [11] => classtwo

 )



and...



Array

( 

   [0] => stdClass

   [1] .... other defined classes....

   [10] => classone

   [11] => classtwo

   [12] => classthree

   [13] => classfour

)

Jazeps Basko
07-Feb-2004 11:52


In PHP5, you don't get declared interfaces by calling this function!!!

To get interfaces you should use get_declared_interfaces(). However, to check if an interface is already defined, you should use class_exists()! This is strange, but PHP team does not think so.

smokey
20-Mar-2003 03:06


you cannot remove them. they are "defined", which happens when the class is being loaded from the parser. you just deleted an instance of a class.

Leigh Purdie
23-Jan-2003 01:01


Note that classes remain in the declared list, even when their associated object is undef'd.



eg:

    $object = new MyClass;

    print_r(get_declared_classes());



    undef($object);

    print_r(get_declared_classes());



- the two print_r's will return the same data.

Not sure how to remove a class from the declared list.

ben [at] efros d0t COM
06-Jul-2001 12:25


To easily check the values, just run:





print_r (get_declared_classes());