Sort array of objects by object fields

usort-example.php

<?php
    protected function compareFunction($a, $b){
        //any compare function (like strcmp, ...) or treatment we want
        if ($a->objIntField == $b->objIntField) {
            return 0;
        }
        return ( $a->objIntField > $b->objIntField );
    }

    public function myAction(){
        // ...
        // to preserve index use uasort
        usort ( $myArray , array($this, 'compareFunction') );
        // ...
    }
?>