Online PHP editor | refs for BXCPR

<?php $oldContact = array( 'name' => 'Joeahkd', 'address' => '123 Masjdhfin', 'city' => 'Spring', 'a-key-only-in-old' => 'foo', 'state' => 'CA', 'zip' => '90101', ); $newContact = array( 'name' => 'Joe', 'a-key-only-in-new' => 'bar', 'address' => '123 Main St', 'city' => 'Springville', 'state' => 'CA', 'zip' => '90101', ); $oldDiff = []; $newDiff = []; foreach ($oldContact + $newContact as $key => $value) { if (isset($oldContact[$key]) && !isset($newContact[$key])) { $oldDiff[$key] = $oldContact[$key]; } elseif (isset($newContact[$key]) && !isset($oldContact[$key])) { $newDiff[$key] = $newContact[$key]; } elseif ($oldContact[$key] !== $newContact[$key]) { $oldDiff[$key] = $oldContact[$key]; $newDiff[$key] = $newContact[$key]; } } echo "Old Diff: " . var_export($oldDiff, true) . "\n"; echo "New Diff: " . var_export($newDiff, true);