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 — Zwraca tablicę z nazwami zdefiniowanych klas
Opis
array get_declared_classes
( void
)
Funkcja ta zwraca tablicę nazw klas zdefiniowanych w bieżącym skrypcie.
Informacja: W PHP 4.0.1pl2, zwracane są trzy dodatkowe klasy na początku tablicy: stdClass (zdefiniowana w Zend/zend.c), OverloadedTestClass (zdefiniowana w ext/standard/basic_functions.c) oraz Directory (zdfiniowana w ext/standard/dir.c).
Warto zauważyć, że zależnie od tego jakie biblioteki zostały dodane do PHP, mogą pojawić się dodatkowe klasy. To znaczy, że nie będzie można zdefiniować własnych klas używając tych nazw. Istnieje lista predefiniowanych klas w sekcji Predefined Classes w dodatkach.
Przykład #1 get_declared_classes() przykład
<?php
print_r(get_declared_classes());
?>
Powyższy przykład wyświetli coś podobnego do:
Array
(
[0] => stdClass
[1] => __PHP_Incomplete_Class
[2] => Directory
)
Patrz także: class_exists() i get_declared_interfaces().
add a note
User Contributed Notesget_declared_classes
dcahh at gmx de
01-Mar-2008 01:23
01-Mar-2008 01:23
dexen + goofy _ pl
26-Sep-2007 02:32
26-Sep-2007 02:32
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 06:58
21-Dec-2005 06:58
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
23-Mar-2005 01:16
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 11:41
01-Nov-2004 11:41
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
08-Feb-2004 03:52
08-Feb-2004 03:52
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
21-Mar-2003 07:06
21-Mar-2003 07:06
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 05:01
23-Jan-2003 05:01
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.