比較值，並獲得主鍵/索引

Question

我有數組：

 $array = array(
      3 => array(
       'first' => 'aaa', 
       'second' => '111', 
       'third' => '!!!' 
      ), 
      7 => array(
       'first' => 'bbb', 
       'second' => '222', 
       'third' => '###' 
      ), 
      9 => array(
       'first' => 'ccc', 
       'second' => '333', 
       'third' => '^^^' 
      ), 

     ); 

和三個變量：

$first = 'bbb'; 
$second = '222'; 
$third = '###'; 

，也可以是數組：

$data = array(
    'first' => 'bbb', 
    'second' => '222', 
    'third' => '###' 
); 

我想獲得這些值從$ array中鍵入。在這個例子中應該返回7.

我該如何比較這個數組與$ first，$ second和$ third或數組$ data，並從$ array中獲取這些值的key？

Answer 1

試試這個：

 $array = array(
     3 => array(
      'first' => 'aaa', 
      'second' => '111', 
      'third' => '!!!' 
     ), 
     7 => array(
      'first' => 'bbb', 
      'second' => '222', 
      'third' => '###' 
     ), 
     9 => array(
      'first' => 'ccc', 
      'second' => '333', 
      'third' => '^^^' 
     ), 
    ); 

    $data = array(
     'first' => 'bbb', 
     'second' => '222', 
     'third' => '###' 
    ); 

    foreach ($array as $key => $val1) { 
     $arr_diff = array_diff($val1, $data); 

     if(empty($arr_diff)) 
     { 
      echo $key; 
     } 
    } 

foreach循環將你正確的答案。