3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class Foo implements Serializable { public function serialize() {} public function unserialize() {} }
Output for 7.0.0 - 7.1.0
Fatal error: Declaration of Foo::unserialize() must be compatible with Serializable::unserialize($serialized) in /in/M4fPt on line 3
Process exited with code 255.
Output for 5.1.0 - 5.2.17, hhvm-3.12.0
Fatal error: Declaration of Foo::unserialize() must be compatible with that of Serializable::unserialize() in /in/M4fPt on line 3
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.6.28
Fatal error: Declaration of Foo::unserialize() must be compatible with Serializable::unserialize($serialized) in /in/M4fPt on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Fatal error: Declaration of Foo::unserialize() must be compatible with that of Serializable::unserialize() in /in/M4fPt on line 4
Process exited with code 255.
Output for 5.0.5
Fatal error: Interface 'Serializable' not found in /in/M4fPt on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'Serializable' not found in /in/M4fPt on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/M4fPt on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting '{' in /in/M4fPt on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/M4fPt on line 3
Process exited with code 255.