php 二维数组排序

php中二维数组重新排序

    public function demo() {
        $array = array(
            0 => array('id' => '4', 'name' => 'Li', 'age' => '35'),
            1 => array('id' => '1', 'name' => 'wang', 'age' => '53'),
            2 => array('id' => '3', 'name' => 'meng', 'age' => '50')
        );
        print_r('原始数组:');
        dump($array);
        $test = array('id' => '5', 'name' => 'qin', 'age' => '80');
        array_push($array, $test); //向二维数组中增加一个元素
        print_r('新增元素后数组:');
        dump($array);
        $array = $this->arraySequence($array); //排序
        print_r('重新排序后数组:');
        dump($array);
    }

    /**
     * 数组重新排序
     * $array 要排序的数组
     * $field 排序字段
     * $sort 排序方式 SORT_DESC 降序；SORT_ASC 升序
     * */
    public function arraySequence($array, $field = 'age', $sort = 'SORT_DESC') {
        $arr = array();
        foreach ($array as $key => $value) {
            foreach ($value as $k => $val) {
                $arr[$k][$key] = $val;
            }
        }
        array_multisort($arr[$field], constant($sort), $array);
        return $array;
    }

结果：

原始数组:

array (size=3)
  0 => 
array (size=3)
      'id' => string '4' (length=1)
      'name' => string 'Li' (length=2)
      'age' => string '35' (length=2)
  1 => 
array (size=3)
      'id' => string '1' (length=1)
      'name' => string 'wang' (length=4)
      'age' => string '53' (length=2)
  2 => 
array (size=3)
      'id' => string '3' (length=1)
      'name' => string 'meng' (length=4)
      'age' => string '50' (length=2)

新增元素后数组:

array (size=4)
  0 => 
array (size=3)
      'id' => string '4' (length=1)
      'name' => string 'Li' (length=2)
      'age' => string '35' (length=2)
  1 => 
array (size=3)
      'id' => string '1' (length=1)
      'name' => string 'wang' (length=4)
      'age' => string '53' (length=2)
  2 => 
array (size=3)
      'id' => string '3' (length=1)
      'name' => string 'meng' (length=4)
      'age' => string '50' (length=2)
  3 => 
array (size=3)
      'id' => string '5' (length=1)
      'name' => string 'qin' (length=3)
      'age' => string '80' (length=2)

重新排序后数组:

array (size=4)
  0 => 
array (size=3)
      'id' => string '5' (length=1)
      'name' => string 'qin' (length=3)
      'age' => string '80' (length=2)
  1 => 
array (size=3)
      'id' => string '1' (length=1)
      'name' => string 'wang' (length=4)
      'age' => string '53' (length=2)
  2 => 
array (size=3)
      'id' => string '3' (length=1)
      'name' => string 'meng' (length=4)
      'age' => string '50' (length=2)
  3 => 
array (size=3)
      'id' => string '4' (length=1)
      'name' => string 'Li' (length=2)
      'age' => string '35' (length=2)