Bug #14104 Updated: uasort doesn't work with static functions from inside classes to compare
| From: | ernst at baschny dot de | Date: | Mon, 19 Nov 2001 08:42:05 +0000 |
| Subject: | Bug #14104 Updated: uasort doesn't work with static functions from inside classes to compare | ||
| References: | 1 | Groups: | php.dev php.doc |
| Request: | Send a blank email to php-dev+get-70869@lists.php.net to get a copy of this message | ||
ID: 14104
User updated by: ernst@baschny.de
Reported By: ernst@baschny.de
Status: Open
Old Bug Type: Arrays related
Bug Type: Documentation problem
Operating System: Linux RedHat 7.2
PHP Version: 4.0.6
New Comment:
Well, in a different context (call_user_func) I found out that it is indeed possible, but not
documented.
To pass a reference to a function inside a Class to a u.*sort Function, pass it as an array with two
elements (the class name and the function name).
For the example above, this does it:
uasort($a, array("TestObj", "cmp_obj"));
Undocumented. So this bug is now a documentation bug. :)
Previous Comments:
------------------------------------------------------------------------
[2001-11-19 03:34:34] ernst@baschny.de
If I have a static function inside a class that does the comparasion of two objects, I haven't
found a way of passing a reference to it in uasort (u.*sort). I tried
"Classname::function", also "Classname->function".
If the function doesn't exists, not even an error is produced, so its very difficult to debug
such things.
Heres an example of what doesn't work:
class TestObj {
var $name;
function TestObj($name) { $this->name = $name; }
/* This is the static comparing function: */
function cmp_obj($a, $b) {
$al = strtolower($a->name);
$bl = strtolower($b->name);
if ($al == $bl) return 0;
return ($al > $bl) ? +1 : -1;
}
}
$a[] = new TestObj("b");
$a[] = new TestObj("a");
$a[] = new TestObj("d");
uasort($a, "TestObj::cmp_obj");
printf("<pre>\n");
print_r($a);
printf("</pre>\n");
-> Result: NOT SORTED.
------------------------------------------------------------------------
Edit this bug report at http://bugs.php.net/?id=14104&edit=1