3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php interface A {} interface B extends A {} class foo { function thing(A $a) { } } class bar extends foo { function thing(B $a) { } }
Output for 7.0.0 - 7.1.0
Warning: Declaration of bar::thing(B $a) should be compatible with foo::thing(A $a) in /in/m9WrP on line 11
Output for 5.4.0 - 5.6.28
Strict Standards: Declaration of bar::thing() should be compatible with foo::thing(A $a) in /in/m9WrP on line 11
Output for 5.0.0 - 5.3.29
Strict Standards: Declaration of bar::thing() should be compatible with that of foo::thing() in /in/m9WrP on line 11
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/m9WrP on line 2
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 in /in/m9WrP on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/m9WrP on line 2
Process exited with code 255.