3v4l.org

run code in 200+ PHP versions simultaneously
<?php class ClassName { public function foo(): ?self { return new ClassName(); } public function bar(): ?self { return null; } } $instance = new ClassName(); $instance->foo(); $instance->bar();
Output for 7.1.0 - 7.4.0
Output for 7.0.0 - 7.0.33
Parse error: syntax error, unexpected '?' in /in/WLnQs on line 5
Process exited with code 255.
Output for 5.1.0 - 5.6.40
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/WLnQs on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/WLnQs on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/WLnQs on line 5
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 T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/WLnQs on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/WLnQs on line 5
Process exited with code 255.