<?php
$a;$b;$temp;
$ara=array(10,20,30,40,50,60,70,80,90,100);



for($a=0,$b=9;$a<10;$a++,$b--)
{
    $temp=$ara[$b];
    $ara[$b]=$ara[$a];

    print_r($ara[$b]."\n");

}