3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = <<<'TEXT' 1. Qatar 2. Qatar 3 . Cathay 4. Qatar 2 . British 3. Qantas TEXT; $output = preg_replace('/(\d+)([.\s]*)/m','$1 . ',$input); echo $output;
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.13
1 . Qatar 2 . Qatar 3 . Cathay 4 . Qatar 2 . British 3 . Qantas
preferences:
145.56 ms | 408 KiB | 5 Q