合并三个数组并按位置字段排序这个新数组

Question

我有3个数组，我将它们与array_merge函数合并。这是给出正确的结果;一个数组正在追加下一个数组。我想根据position字段显示我的数组。

$this->array1 = $this->function1(); 
$this->array2 = $this->function2(); 
$this->array3 = this->function3(); 
$this->result= array_merge($this->array1,$this->array2,this->array3); 

我从上面排列合并得到以下结果： -

Array 
(
    [0] => Array 
     (
      [id_custom] => 1 
      [id_product] => 1904 
      [position] => 1 
      [active] => 1 

     ) 

    [1] => Array 
     (
      [id_custom] => 6 
      [id_product] => 1386 
      [position] => 3 
      [active] => 1 

     ) 

    [2] => Array 
     (
      [id_custom] => 5 
      [id_product] => 2008 
      [position] => 2 
     [active] => 1 

     ) 

    [3] => Array 
     (
      [id_custom] => 8 
      [id_product] => 0 
      [id_category] => 0 
      [position] => 99 
      [active] => 1 
     ) 

) 

但我想基于像postion领域的阵列是显示： -

Array 
(
    [0] => Array 
     (
      [id_custom] => 1 
      [id_product] => 1904 
      [position] => 1 
      [active] => 1 

     ) 



    [2] => Array 
     (
      [id_custom] => 5 
      [id_product] => 2008 
      [position] => 2 
      [active] => 1 

     ) 

    [1] => Array 
     (
      [id_custom] => 6 
      [id_product] => 1386 
      [position] => 3 
      [active] => 1 

     ) 

    [3] => Array 
     (
      [id_custom] => 8 
      [id_product] => 0 
      [id_category] => 0 
      [position] => 99 
      [set_devices] => 
      [active] => 1 
     ) 

) 

任何想法如何显示基于position字段的数组？

Answer 1

要根据字段对数组进行排序，您需要使用usort函数（请参阅http://php.net/manual/en/function.usort.php）。

这允许您编写自定义比较函数，以便给出数组中的两个元素，指出哪一个应该先到达。

在你的情况，这将是这样的：

function comparePosition($a, $b) 
{ 
    if ($a['position'] == $b['position']) { 
     return 0; 
    } 
    if ($a['position'] < $b['position']) { 
     return -1; 
    }  
    return 1; 
} 

usort($this->array1, 'comparePosition');