多維數組，找到物品並移動到頂部？

Question

我試圖做一些功能，會發現（在下面的數組中）的id爲2的對象，並將其移動到數組的頂部。這裏的原始數組：

Array 
(
    [0] => stdClass Object 
     (
      [id] => 177 
      [startdate] => 2014-08-02 
     ) 

    [1] => stdClass Object 
     (
      [id] => 178 
      [startdate] => 2014-08-02 
     ) 

    [2] => stdClass Object 
     (
      [id] => 2 
      [startdate] => 2014-07-28 
     ) 

    [3] => stdClass Object 
     (
      [id] => 82 
      [startdate] => 2014-07-28 

     ) 

    [4] => stdClass Object 
     (
      [id] => 199 
      [startdate] => 2013-10-10 
     ) 
) 

這裏是什麼我也想輸出（與移動數組項）：

Array 
(

    [0] => stdClass Object 
     (
      [id] => 2 
      [startdate] => 2014-07-28 
     ) 
    [1] => stdClass Object 
     (
      [id] => 177 
      [startdate] => 2014-08-02 
     ) 

    [2] => stdClass Object 
     (
      [id] => 178 
      [startdate] => 2014-08-02 
     ) 

    [3] => stdClass Object 
     (
      [id] => 82 
      [startdate] => 2014-07-28 

     ) 

    [4] => stdClass Object 
     (
      [id] => 199 
      [startdate] => 2013-10-10 
     ) 
) 

任何幫助，將不勝感激。

Answer 1

function customShift($array, $id){ 
    foreach($array as $key => $val){  // loop all elements 
     if($val->id == $id){    // check for id $id 
      unset($array[$key]);   // unset the $array with id $id 
      array_unshift($array, $val); // unshift the array with $val to push in the beginning of array 
      return $array;    // return new $array 
     } 
    } 
} 

print_r(customShift($data, 2));