How can I merge PHP arrays?

Question

I have two arrays of animals (for example).

$array = array(
    array(
        \'id\' => 1,
        \'name\' => \'Cat\',
    ),
    array(
        \'id         


        

Answer 1

This does what Erik suggested (id no. as array key) and merges vlaues in $array2 to $results.

$results = array();

foreach($array as $subarray)
{
    $results[$subarray['id']] = array('name' => $subarray['name']);
}

foreach($array2 as $subarray)
{
    if(array_key_exists($subarray['id'], $results))
    {
        // Loop through $subarray would go here if you have extra 
        $results[$subarray['id']]['age'] = $subarray['age'];
    }
}