get_class
This function considers only classes and subclasses. Not subsubclasses.
In fact I have code that provides an abstract class and then classes using this abstract class. Further I have subclasses to my concrete classes - which is why my subclasses are not listed within the returned array.
get_declared_classes
(PHP 4, PHP 5)
get_declared_classes — Возвращает массив с именами объявленных классов
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().
add a note
User Contributed Notesget_declared_classes
dcahh at gmx de
29-Feb-2008 09:23
29-Feb-2008 09:23
dexen + goofy _ pl
25-Sep-2007 11:32
25-Sep-2007 11:32
Summary:
* in PHP 5.1 class names have case preserved
* contrary, in PHP 4.4 class names are downcased, withe exception of a few build-in ones
The get_declared_classes() funcition returns the list of names with case preserved, as of PHP 5.1 series (prolly 5.0 too, but i have no way to test it right now). Since PHP generally is caseless in regard to names of classes, this may come at a surprise. Also, this could potentially break older code asssuming downcased list.
Take extra care when checking for existence of a class. Following example is, potentially, error prone: <?php in_array( $className, $classget_declared_classes() ) ?>
A sure-fire (while slower) way would be to iterate over the array and normalize case to, say, lower:
<?php
$exists = FALSE;
$className = strtolower( $className );
foreach ( get_declared_classes() as $c ) {
if ( $className === strtolower( $c ) ) {
$exists = TRUE;
break;
}
}?>
Optimization of the above snippet is left as a simple excercise to the reader ;)
-- dexen deVries
matt at mattsoft dot net
21-Dec-2005 02:58
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
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
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
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
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.