3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class A{ const X = 1; const Y = X; } class B extends A{ const X=2; } echo B::Y;
Output for 5.0.0 - 7.1.0
Notice: Use of undefined constant X - assumed 'X' in /in/MNdcc on line 9 X
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/MNdcc 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_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/MNdcc on line 3
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/MNdcc on line 3
Process exited with code 255.