php - filter array after merging keys of one array -

i trying create filtered array 3 using array 1 , array 2.

array 1

array (            [title] => value            [title2] => value2            [title3] => value3       ) 

array 2

array (            [0] => array ( [id] => 20 [title2] => value2 [othercolumn1] => othervalue1)           [1] => array ( [id] => 21 [title4] => value4 [othercolumn3] => othervalue3)       )  

desired result after applying intersection method:

array 3

array ( [title2] => value2 ) 

so far unable achieve result because array 1 , 2 have non-matching structures. have tried different techniques unable compare them due structure differences.

   if (!empty($data1['array2'][0])) {                  foreach ($data1['array2'] $key) {  //                    $filtered= array_intersect($array1,$key);                     //  print_r($key);                 }                 // $filtered= array_intersect($array1,$data1['array2']);// if use $data1['array2'][0] filters fine 1 row                  //    print_r($filtered);             } 

any appreciated. thank you.

given arrays:

$arr = array('title' => 'value', 'title2' => 'value2', 'title3' => 'value3'); $arr2 = array (         0 => array ( 'id' => '20', 'title2' => 'value2', 'othercolumn1' => 'othervalue1'),         1 => array ( 'id' => '21', 'title4' => 'value4', 'othercolumn3' => 'othervalue3')); 

you can filtered array this:

$merged = call_user_func_array('array_merge', $arr2); $filtered = array_intersect($arr, $merged); 

if want intersect according keys can use instead:

$filtered = array_intersect_key($arr, $merged);