3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo is_resource(@fopen('http://www.youtube.com/')) ? 'OK' : 'NO';
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught ArgumentCountError: fopen() expects at least 2 arguments, 1 given in /in/7MtgD:3 Stack trace: #0 /in/7MtgD(3): fopen('http://www.yout...') #1 {main} thrown in /in/7MtgD on line 3
Process exited with code 255.
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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
NO

preferences:
246.92 ms | 404 KiB | 348 Q