3v4l.org

run code in 300+ PHP versions simultaneously
<!DOCTYPE html> <html> <body> <?php // This is a single line comment # This is also a single line comment /* This is a multiple lines comment block that spans over more than one line */ ?> </body> </html>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<!DOCTYPE html> <html> <body> Fatal error: Uncaught Error: Undefined constant "comment" in /in/hpnfZ:7 Stack trace: #0 {main} thrown in /in/hpnfZ on line 7
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
<!DOCTYPE html> <html> <body> Warning: Use of undefined constant comment - assumed 'comment' (this will throw an Error in a future version of PHP) in /in/hpnfZ on line 7 </body> </html>
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20
<!DOCTYPE html> <html> <body> Notice: Use of undefined constant comment - assumed 'comment' in /in/hpnfZ on line 7 </body> </html>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28
<!DOCTYPE html> <html> <body> Notice: Use of undefined constant comment - assumed 'comment' in /in/hpnfZ on line 14 </body> </html>

preferences:
193.29 ms | 403 KiB | 312 Q