Is there a better way to combine these arrays?

Question

Is there a better way to do this kind of array combination with a PHP native function like array_combine? I'm trying to improve my skills, and at certain points I note that I am using too many nested foreach for almost everything.

Using PHP 5.4

 $array = Array(
 'GroupName' => 'Emilio',
 'Moduleid' => Array(
 0 => 15,
 1 => 12,
 2 => 9,
 3 => 1,
 4 => 11,
 5 => 10
 ),
 'Permission' => Array(
 15 => 'W',
 12 => 'R',
 14 => 'W',
 9 => 'W',
 1 => 'R',
 13 => 'W',
 11 => 'W',
 10 => 'R'
 )
 );
 foreach ($array['Moduleid'] as $value) {
 foreach ($array['Permission'] as $key1 => $value1) {
 if ($value == $key1) {
 $result[$key1] = $value1;
 }
 }
 }
 $newArray = array(
 'GroupName' => $array['GroupName'],
 'ModulePermission' => $result
 );
 unset($array);
 echo '<pre>';
 print_r($newArray);
 echo '</pre>';

Output

Array
(
 [GroupName] => Emilio
 [ModulePermission] => Array
 (
 [15] => W
 [12] => R
 [9] => W
 [1] => R
 [11] => W
 [10] => R
 )
)

Answer 1

You can simplify this code considerably using the built-in array functions, specifically array_flip and array_intersect_key.

$newArray = array(
 'GroupName' => $array['GroupName'],
 'ModulePermission' => 
 array_intersect_key($array['Permission'], 
 array_flip($array['Moduleid'])
 )
);

Answer 2

Using in_array can be droped one foreach

$result = array();
foreach ($array['Permission'] as $key => $value) {
 if (in_array($key, $array['Moduleid'])) {
 $result[$key] = $value;
 }
}