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<?php trait Blah { function getOne() { return 1;} } abstract class AbstractTest { use Blah; } class Test extends AbstractTest {} function hier($class) { $traits = class_uses($class) ?: []; $parents = class_parents($t) ?: []; foreach ($parents as $parent) { array_merge($traits, hier($parent)); } return $traits; } $t = new Test; echo $t->getOne() . "\n"; var_dump(hier($t));
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
1 Warning: Undefined variable $t in /in/AAqZK on line 15 Fatal error: Uncaught TypeError: class_parents(): Argument #1 ($object_or_class) must be of type object|string, null given in /in/AAqZK:15 Stack trace: #0 /in/AAqZK(15): class_parents(NULL) #1 /in/AAqZK(29): hier(Object(Test)) #2 {main} thrown in /in/AAqZK on line 15
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
1 Notice: Undefined variable: t in /in/AAqZK on line 15 Warning: class_parents(): object or string expected in /in/AAqZK on line 15 array(0) { }
Output for 7.3.32 - 7.3.33
1 Warning: class_parents(): object or string expected in /in/AAqZK on line 15 array(0) { }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/AAqZK on line 3
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/AAqZK on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/AAqZK on line 3
Process exited with code 255.
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