在不影響密鑰的情況下過濾多維數組

Question

我正在開發一個自定義PHP項目，我需要獲取多維數組的子集。

我有一個數組

 
Array 
(
    [0] => Array 
     (
      [0] => 2011 
      [1] => Allegany 
      [2] => 55.4 
     ) 

    [1] => Array 
     (
      [0] => 2012 
      [1] => Albany 
      [2] => 325.1 
     ) 

    [2] => Array 
     (
      [0] => 2011 
      [1] => Bronx 
      [2] => 11 
     ) 
    [3] => Array 
     (
      [0] => 2012 
      [1] => Bronx 
      [2] => 11 
     ) 
) 

欲返回一個陣列，其中[0] => 2012存在，像下面

 
Array 
(


    [1] => Array 
     (
      [0] => 2012 
      [1] => Albany 
      [2] => 325.1 
     ) 


    [3] => Array 
     (
      [0] => 2012 
      [1] => Bronx 
      [2] => 11 
     ) 
) 

Answer 1

的array_filter()功能被寫入允許您根據可定製的標準從陣列中選擇一個子集條目

$subset = array_filter(
    $originalArray, 
    function($value) { 
     return isset($value[0]) && $value[0] == 2012; 
    } 
); 

或更通用的變種：

$searchColumn = 0; 
$searchValue = 2012; 

$subset = array_filter(
    $originalArray, 
    function($value) use ($searchColumn, $searchValue) { 
     return isset($value[$searchColumn]) && $value[$searchColumn] == $searchValue; 
    } 
); 

編輯

變，以簡化在不同的列

$searchCriteria = [0 => 2012, 2 => 11]; 

$subset = array_filter(
    $originalArray, 
    function($value) use ($searchCriteria) { 
     return count($searchCriteria) == count(array_intersect_assoc($value, $searchCriteria)); 
    } 
);