3v4l.org

run code in 300+ PHP versions simultaneously
<!DOCTYPE html> <html> <body> <?php $date = 5; $a = date('Y-m-d', strtotime('+1 month', $date)); echo $a; ?> </body> </html>
Output for 5.6.0 - 5.6.29, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
<!DOCTYPE html> <html> <body> 1970-02-01 </body> </html>
preferences:
187.05 ms | 404 KiB | 236 Q