3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo { const A = "FooA"; const B = self::A . self::C; const C = "FooC"; } class Bar extends Foo { const A = "BarA"; const C = "BarC"; } var_dump(Bar::B);
based on WaTiG
Output for 7.1.4 - 7.1.33, 7.2.0 - 7.2.31, 7.3.0 - 7.3.19, 7.4.0 - 7.4.8, 8.0.0alpha1 - alpha2
string(8) "FooAFooC"
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.3
string(8) "FooABarC"
Output for 5.6.0 - 5.6.40
string(8) "BarABarC"
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38
Parse error: syntax error, unexpected '.', expecting ',' or ';' in /in/sXiiL 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/sXiiL on line 5
Process exited with code 255.
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/sXiiL on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_CONST, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/sXiiL on line 4
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/sXiiL on line 4
Process exited with code 255.