3v4l.org

run code in 500+ PHP versions simultaneously
<?php $phones = [ '00491384004924', '0491384004924', '491384004924', ]; foreach ($phones as $phone) { $phone = preg_replace('/^0{0,2}49/', '0', $phone); echo $phone, PHP_EOL; }
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
01384004924 01384004924 01384004924

preferences:
91.35 ms | 1283 KiB | 4 Q