3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo(\DateTime $x = null) {} foo(null);
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.1.0 - 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 - 4.4.1
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.