Edit report at https://bugs.php.net/bug.php?id=51126&edit=1
ID: 51126
Comment by: php dot net at jluis dot com dot ar
Reported by: richard at rjharrison dot org
Summary: class_exists + namespaces
Status: Not a bug
Type: Bug
Package: SPL related
Operating System: linux
PHP Version: 5.3.1
Block user comment: N
Private report: N
New Comment:
I have a very similar problem, not with class exists, but with dynamic
instantiation:
return ($dynamic? new $className : new SelectMysql);
I can fix it concatenating __NAMESPACE__, but it seems weird that PHP cannot
determine this.
Here's a working example:
Select.php
<?php
namespace sql;
abstract class Select {
abstract function limit($limit, $offset);
static function factory($dynamic = true) {
$className = "SelectMysql";
return ($dynamic? new $className : new SelectMysql);
}
}
?>
SelectMysql.php
<?php
namespace sql;
class SelectMysql {
function limit($limit, $offset) {
return;
}
}
?>
test.php
<?php
include('Select.php');
include('SelectMysql.php');
// this works
$select = sql\Select::factory(true);
// this does not
$select = sql\Select::factory(true);
?>
Previous Comments:
------------------------------------------------------------------------
[2011-10-10 10:37:50] dmittner at llnw dot com
I agree that this behavior is counter-intuitive. I seem to have just run into
the same problem, myself, where my autoload works just fine where
class_exists() returns false.
In short... class_exists() should really infer the given namespace of the
current file, just like it's inferred in all other uses.
------------------------------------------------------------------------
[2010-02-23 19:02:17] richard at rjharrison dot org
Hi Johannes,
I double-checked the documentation and found no mention that the string passed
to class_exists() must be fully qualified. Perhaps this is a documentation bug.
It is certainly seems inconsistent/counter-intuitive:-
class_exists('Things\Car'); // FALSE, class does not exist
$car = new Things\Car(); // HUH? Class does exist after all
So PHP is able to figure out there is a "use Foo/Things" namespace in effect on
one line, but not on the other? Lame.
------------------------------------------------------------------------
[2010-02-23 18:46:01] johan...@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
When used as a string we need the fully qualified name as we don't know where
the parameter is coming from.
------------------------------------------------------------------------
[2010-02-23 18:41:57] richard at rjharrison dot org
Description:
------------
class_exists() is not calling my spl_autoload_register'ed function with a fully
qualified (namespaced) class name.
Because the input to my autoload function is not fully qualified, it cannot
load the class and class_exists return false; however, if I try to instantiate
the class that "does not exist" then the correct, fully qualified class now
passed to the autoloader: it correctly loads the class and my code works.
Reproduce code:
---------------
// register my autoloader
use Foo\Things;
// This fails: my autoload function is called with $class = 'Things\Car'
if(class_exists('Things\Car')){
echo "class exists!";
}else{
echo "Weird?";
}
// This works: my autoload function is called with $class = 'Foo\Things\Car'
$x = new Things\Car();
Expected result:
----------------
"class exists!"
Actual result:
--------------
"Weird?"
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=51126&edit=1
