Implementation method of sorting specified key names in php two-dimensional array

<?php
/*二维数组按指定的键值排序*/
function array_sort($array,$keys,$type=&#39;asc&#39;){
  if(!isset($array) || !is_array($array) || empty($array)){
    return &#39;&#39;;
  }
  //排序字段名，如：id
  if(!isset($keys) || trim($keys)==&#39;&#39;){
    return &#39;&#39;;
  }
  //排序方式，如：desc、asc
  if(!isset($type) || $type==&#39;&#39; || !in_array(strtolower($type),array(&#39;asc&#39;,&#39;desc&#39;))){
    return &#39;&#39;;
  }
  //定义一个数组
  $keysvalue=array();
  foreach($array as $key=>$val){
    //对排序字段值进行过滤
    $val[$keys] = str_replace(&#39;-&#39;,&#39;&#39;,$val[$keys]);
    $val[$keys] = str_replace(&#39; &#39;,&#39;&#39;,$val[$keys]);
    $val[$keys] = str_replace(&#39;:&#39;,&#39;&#39;,$val[$keys]);
    //将记录中指定的键名放入数组中，如：[0]=>5,[1]=>3,[2]=>6
    $keysvalue[] =$val[$keys];//排序字段，如：id     索引=》排序键名
  }
  asort($keysvalue); //按值升序排序，且保持键名与键值之间的索引关系,如：[1]=>3,[0]=>5,[2]=>6
  reset($keysvalue); //指针重新指向数组第一个
  foreach($keysvalue as $key=>$vals) {
    $keysort[] = $key;//0=>[1],1=>[0],2=>[2]
  }
  $keysvalue = array();
  $count=count($keysort);//排序记录数
  if(strtolower($type) != &#39;asc&#39;){//降序
    for($i=$count-1; $i>=0; $i--) {
      $keysvalue[] = $array[$keysort[$i]];
    }
  }else{//升序
    for($i=0; $i<$count; $i++){
      $keysvalue[] = $array[$keysort[$i]];
    }
  }
  return $keysvalue;
}
$array=array(
  array(&#39;name&#39;=>&#39;Tom&#39;,&#39;age&#39;=>&#39;23&#39;,&#39;like&#39;=>&#39;beer&#39;),
  array(&#39;name&#39;=>&#39;Trump&#39;,&#39;age&#39;=>&#39;50&#39;,&#39;like&#39;=>&#39;Food&#39;),
  array(&#39;name&#39;=>&#39;Jack&#39;,&#39;age&#39;=>&#39;26&#39;,&#39;like&#39;=>&#39;Travel&#39;)
);
print_r(array_sort($array,&#39;age&#39;));
?>

Array
(
  [0] => Array
    (
      [name] => Tom
      [age] => 23
      [like] => beer
    )
  [1] => Array
    (
      [name] => Jack
      [age] => 26
      [like] => Travel
    )
  [2] => Array
    (
      [name] => Trump
      [age] => 50
      [like] => Food
    )
)