$arr = array(1, 2, 3, 4, 5, 6, 7, 8, 9);
$n = count($arr);
$temp[$n];
$small=0; $large=$n-1;
$flag = true;
for ($i=0; $i<$n; $i++)
{
if ($flag){
$temp[$i] = $arr[$large--];
}
else{
$temp[$i] = $arr[$small++];
}
$flag = !$flag;
}
for ($i=0; $i<$n; $i++){
$arr[$i] = $temp[$i];
}
print_r($arr);
Rearrange array max value and min value after that second max and second min
