Online PHP editor | refs for WY1kP

<?php $text = ' Balthazar - True Love # Maarten Devoldere Adani & Wolf - Let It Go # Daniel Testas Adani & Wolf - Let It Go # Rob Gaasterland Balthazar - True Love # Maarten Devoldere Balthazar - True Love # Jinte Deprez Balthazar - True Love # Name 3 '; preg_match_all('/^([^#]+)#([^\n]+)/m', trim($text), $matches, PREG_SET_ORDER); foreach ($matches as $v) { $result[trim($v[1])][] = trim($v[2]); } foreach ($result as $k => $v){ echo $k .' # '. join(', ', $v) . PHP_EOL; }