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<?php class Test { public static function get($what) { return constant("self::" . $what); } } class Test2 extends Test { const OMG = 11; } $test = new Test2(); var_dump($test->get("OMG")); var_dump($test::OMG);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant self::OMG in /in/d6a8Q:5 Stack trace: #0 /in/d6a8Q(5): constant('self::OMG') #1 /in/d6a8Q(15): Test::get('OMG') #2 {main} thrown in /in/d6a8Q on line 5
Process exited with code 255.
Output for 5.3.3 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: constant(): Couldn't find constant self::OMG in /in/d6a8Q on line 5 NULL int(11)
Output for 5.3.0 - 5.3.2
Fatal error: Undefined class constant 'self::OMG' in /in/d6a8Q on line 5
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /in/d6a8Q on line 16
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_PAAMAYIM_NEKUDOTAYIM in /in/d6a8Q on line 16
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/d6a8Q 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_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/d6a8Q 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/d6a8Q on line 4
Process exited with code 255.

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