3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php class X {} class Y extends X {} class A { function f(): X {} } class B extends A { function f(): Y {} }
based on GRpOO
Output for 7.0.0 - 7.0.2
Fatal error: Declaration of B::f(): Y must be compatible with A::f(): X in /in/TlYNG on line 11
Process exited with code 255.
Output for 5.1.0 - 5.6.17
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/TlYNG on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected ':', expecting '{' or ';' in /in/TlYNG on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ':', expecting '{' in /in/TlYNG on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected ':', expecting '{' in /in/TlYNG on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/TlYNG on line 7
Process exited with code 255.