3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class C implements JsonSerializable { public function jsonSerialize() { return clone($this); } } echo json_encode(new C());
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0

Process exited with code 139.
Output for hhvm-3.12.0
Fatal error: Stack overflow in /in/OJr82 on line 6
Process exited with code 255.
Output for hhvm-3.10.0
Fatal error: Stack overflow in /in/OJr82 on line 9
Process exited with code 255.
Output for 5.0.5 - 5.3.29
Fatal error: Interface 'JsonSerializable' not found in /in/OJr82 on line 4
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Fatal error: Class 'JsonSerializable' not found in /in/OJr82 on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/OJr82 on line 4
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/OJr82 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/OJr82 on line 4
Process exited with code 255.