php根据一个给定范围和步进生成数组的方法

function array_range($from, $to, $step=1){  $array = array();  for ($x=$from; $x <= $to; $x += $step){    $array[] = $x;  }  return $array;}print_r(array_range(0, 20, 5));/*returns:Array(  [0] => 0  [1] => 5  [2] => 10  [3] => 15  [4] => 20)*/