Question

Need to match 2 keys in 2 multidimensional arrays and return matches from the first array if found.

array1 =>

$arr[1] = array('fruit' => 'apple', 'ver' => '1', 'color' => 'blue', 'name' =>'joe');
$arr[2] = array('fruit' => 'peach', 'ver' => '2', 'color' => 'red', 'name' =>'jane');
$arr[3] = array('fruit' => 'apple', 'ver' => '1', 'color' => 'red', 'name' =>'jack');
$arr[4] = array('fruit' => 'apple', 'ver' => '4', 'color' => 'grey', 'name' =>'joe');



array2 =>

$arr[1] = array('fruit' => 'apple', 'ver' => '4', 'color' => 'red', 'name' =>'joe');
$arr[2] = array('fruit' => 'apple', 'ver' => '4', 'color' => 'red', 'name' =>'jane');

I need to match 2 key values, in this example only return the matches in array1 that match array2. The key values for example are the keys
fruit and name.

In the above example you can see this match should only return $arr1 and $arr4 for array1 since they match $arr[1] in array2. I need to return the matches only for array1.

This is an example, the real case I do not know the array varibale indicator or the amount ( likely a few hundred in each).

Answer 1

$array = (
    0 => array('fruit' => 'apple' etc....
    etc...
);

$find_these = array('fruit' => 'apple', 'ver' => 4, 'color' => red, etc...);

$fruit = $find_these['apple'];
$ver = $find_these['ver'];

$found = array();

foreach($array as $key => $subarray) {
   if (($subarray['fruit'] == $fruit) && ($subarray['ver'] == $ver))
       $found[$key] = $subarray;
   }
}

After this, $found will be a new array containing copies of all the subarrays which have matching fruit/ver fields.