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<?php class A { public static $data = ['a']; public static function getData() { $classes = [get_called_class()]; $classes += class_parents($classes[0]); return call_user_func_array('array_merge', array_map( function($class) { return $class::$data; }, $classes ) ); } } class B extends A { public static $data = ['b']; } class C extends B { public static $data = ['c']; } class D extends C { public static $data = ['d']; } var_dump(A::getData()); var_dump(B::getData()); var_dump(C::getData()); var_dump(D::getData());
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array(1) { [0]=> string(1) "a" } Fatal error: Uncaught ArgumentCountError: array_merge() does not accept unknown named parameters in /in/jsZqE:16 Stack trace: #0 /in/jsZqE(16): array_merge(Array, A: Array) #1 /in/jsZqE(38): A::getData() #2 {main} thrown in /in/jsZqE on line 16
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(1) { [0]=> string(1) "a" } Fatal error: Uncaught ArgumentCountError: array_merge() does not accept unknown named parameters in /in/jsZqE:16 Stack trace: #0 /in/jsZqE(16): array_merge(Array, A: Array) #1 /in/jsZqE(38): A::getData() #2 {main} thrown in /in/jsZqE on line 16
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(1) { [0]=> string(1) "a" } array(2) { [0]=> string(1) "b" [1]=> string(1) "a" } array(3) { [0]=> string(1) "c" [1]=> string(1) "b" [2]=> string(1) "a" } array(4) { [0]=> string(1) "d" [1]=> string(1) "c" [2]=> string(1) "b" [3]=> string(1) "a" }
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/jsZqE on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/jsZqE on line 5
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/jsZqE on line 5
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/jsZqE on line 5
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/jsZqE on line 5
Process exited with code 255.
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