3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo(\DateTime $x = null) {} foo(null);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/u1Kp7 on line 3
Output for 5.0.0 - 5.0.5
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/u1Kp7 on line 3 Fatal error: Argument 1 must not be null in /in/u1Kp7 on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/u1Kp7 on line 3 Parse error: syntax error, unexpected T_STRING, expecting ')' in /in/u1Kp7 on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/u1Kp7 on line 3 Parse error: parse error, unexpected T_STRING, expecting ')' in /in/u1Kp7 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/u1Kp7 on line 3 Parse error: parse error, expecting `')'' in /in/u1Kp7 on line 3
Process exited with code 255.

preferences:
284.14 ms | 402 KiB | 462 Q