How to sort array of classes based on the value of property

[Moti.Ba@gmail.com]

Hello,

I have a class like this one

Class foo
{
public $sum;
}

And I have an array of instances based on this class. When I use
ksort() the array is sorted by key, next I want to sort it by the $sum
property.

How can I do it?

[ZeldorBlat]

Re: How to sort array of classes based on the value of property


Moti.Ba@gmail.c om wrote:

Hello,
>
I have a class like this one
>
Class foo
{
public $sum;
}
>
And I have an array of instances based on this class. When I use
ksort() the array is sorted by key, next I want to sort it by the $sum
property.
>
How can I do it?

Try usort():
<http://www.php.net/usort>

Something like this should work:

function cmpFoo($a, $b)
{
if ($a->sum == $b->sum)
return 0;

return ($a->sum < $b->sum) ? -1 : 1;
}

usort($arr, "cmpFoo"); //$arr is the array of objects