在多維數組（PHP）中搜索

Question

最近我遇到了一個問題，這讓我發瘋。我有這樣一個多維數組：

$a = array(
'db' => array(
    '0' => array(
     'id' => '1', 
     'name' => 'test', 
     'cat' => array(
      'a' => '15', 
      'b' => '20', 
      'c' => '30' 
     ), 
     'canvas' => '2' 
    ), 
    '1' => array(
     'id' => '2', 
     'name' => 'test2', 
     'cat' => array(
      'a' => '15', 
      'b' => '20', 
      'c' => '30' 
     ), 
     'canvas' => '2' 
    ) 
    '2' => array(
     'id' => '3', 
     'name' => 'test', 
     'cat' => array(
      'a' => '50', 
      'b' => '40', 
      'c' => '90' 
     ), 
     'canvas' => '1' 
    ) 
) 
); 

而我想用它來搜索它：search（'canvas = 1'）;

，將返回所有的陣列，DB的孩子，有值1。或者，例如一鍵帆布：

搜索（「A = 15」）;

都將返回一個有鑰匙，貓的孩子所有的數組，命名爲並與15

Answer 1

$a = array(
'db' => array(
    '0' => array(
     'id' => '1', 
     'name' => 'test', 
     'cat' => array(
      'a' => '15', 
      'b' => '20', 
      'c' => '30' 
     ), 
     'canvas' => '2' 
    ), 
    '1' => array(
     'id' => '2', 
     'name' => 'test2', 
     'cat' => array(
      'a' => '15', 
      'b' => '20', 
      'c' => '30' 
     ), 
     'canvas' => '2' 
    ), 
) 
); 

//checks if array $array contains element with $searchKey key, and $searchVal value 
function arrayContains($array, $searchVal, $searchKey) { 
     if (!is_array($array)) 
      return false; 
     foreach ($array as $key => $value) { 
      if ($key === $searchKey && $searchVal === $value) 
       return true; 
      if (is_array($value) && arrayContains($value, $searchVal, $searchKey)) 
       return true; 
     } 
     return false; 
    } 

function search($a, $search) { 
    list($searchKey, $searchVal) = explode('=', $search); 
    $result = array(); 
    foreach($a as $val) { 
     if (arrayContains($val, $searchVal, $searchKey)) 
      $result[] = $val; 
    } 
    return $result; 
} 

print_r(search($a['db'], "a=15")); 
print_r(search($a['db'], "canvas=1")); 

其中產生這樣的輸出值（輸出變量$ a [」子陣列DB']包含搜索鍵=>值對）：

Array 
(
    [0] => Array 
     (
      [id] => 1 
      [name] => test 
      [cat] => Array 
       (
        [a] => 15 
        [b] => 20 
        [c] => 30 
       ) 

      [canvas] => 2 
     ) 

    [1] => Array 
     (
      [id] => 2 
      [name] => test2 
      [cat] => Array 
       (
        [a] => 15 
        [b] => 20 
        [c] => 30 
       ) 

      [canvas] => 2 
     ) 

) 
Array 
(
    [0] => Array 
     (
      [id] => 3 
      [name] => test 
      [cat] => Array 
       (
        [a] => 50 
        [b] => 40 
        [c] => 90 
       ) 

      [canvas] => 1 
     ) 

) 

Answer 2

function search($array, $canvas) 
{ 
    $result = array(); 
    foreach ($array as $k1 => $v1) { 
     foreach ($v1 as $k2 => $v2) { 
      if ($v2['canvas'] == $canvas) { 
       $result[] = $array[$k1][$k2]; 
      } 
     } 
    } 
    return $result; 
} 

// $a = your array 
print_r(search($a, 1)); 

Answer 3

只需選中下面的鏈接，如果這能幫助你 - http://php.net/manual/en/function.array-search.php

它包含php函數array_search()的詳細文檔以及用於在多維數組中搜索以及用戶評論的各種用戶代碼。