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php实例分享之二维数组排序

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Release: 2016-06-13 09:35:07
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PHP一维数组的排序可以用sort(),asort(),arsort()等函数;

PHP二维数组的排序需要自定义。

以下函数是对一个给定的二维数组按照指定的键值进行排序,先看函数定义:

复制代码 代码如下:


function array_sort($arr,$keys,$type='asc'){
 $keysvalue = $new_array = array();
 foreach ($arr as $k=>$v){
  $keysvalue[$k] = $v[$keys];
 }
 if($type == 'asc'){
  asort($keysvalue);
 }else{
  arsort($keysvalue);
 }
 reset($keysvalue);

 $index = 0;//保存下标不变用$k,下标从0开始就用$index;
 foreach ($keysvalue as $k=>$v){

  
  $new_array[$index] = $arr[$k];

  $index++;
 }
 return $new_array;
}

它可以对二维数组按照指定的键值进行排序,也可以指定升序或降序排序法(默认为升序),用法示例:

复制代码 代码如下:


$array = array(
 array('name'=>'Js','date'=>'2014-05-01'),
 array('name'=>'Sh','date'=>'2014-04-30'),
 array('name'=>'Bj','date'=>'2014-05-02')
);

$arrayList = array_sort($array,'date');
print_r($arrayList);

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