This should emulate range() a little better.
<?php
function range_wroar($low, $high, $step = 1) {
    $arr = array();
    $step = (abs($step)>0)?abs($step):1;
    $sign = ($low<=$high)?1:-1;
    if(is_numeric($low) && is_numeric($high)) {
        //numeric sequence
        for ($i = (float)$low; $i*$sign <= $high*$sign; $i += $step*$sign)
            $arr[] = $i;
    }    else    {
        //character sequence
        if (is_numeric($low)) 
            return $this->range($low, 0, $step);
        if (is_numeric($high))
            return $this->range(0, $high, $step);
        $low = ord($low);
        $high = ord($high);
        for ($i = $low; $i*$sign <= $high*$sign; $i += $step*$sign) {
                
            $arr[] = chr($i);
        }
    }
    return $arr;
}
?>