Online PHP editor | refs for s4u87

<?php $a = [ '00:00:00' => [ 'name' => 'Arr Name 1', 'other-details' => 'Arr Desscription 1', 'type' => 'Arr Type 1' ], '00:00:30' => [ 'name' => 'Arr Name 2', 'other-details' => 'Arr Desscription 2', 'type' => 'Arr Type 2' ], '00:01:00' => [ 'name' => 'Arr Name 3', 'other-details' => 'Arr Desscription 3', 'type' => 'Arr Type 3' ], '00:01:30' => [ 'name' => 'Arr Name 4', 'other-details' => 'Arr Desscription 4', 'type' => 'Arr Type 4' ] ]; $keys = array_keys($a); for ($i = 0; $i < count($keys); $i++) { $result = $keys[$i]; if (array_key_exists($i+1, $keys)) { $result .= " " . $keys[$i + 1]; } echo $result . PHP_EOL; }