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<?php namespace NAME_SPACE; trait Bar { public static function qux() { var_dump(self::class, static::class); return new \ReflectionFunction(function () { return __METHOD__; }); } } class Foo { use Bar; } var_dump(Foo::qux()->invoke()); Bar::qux();
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(14) "NAME_SPACE\Foo" string(14) "NAME_SPACE\Foo" string(20) "NAME_SPACE\{closure}" Deprecated: Calling static trait method NAME_SPACE\Bar::qux is deprecated, it should only be called on a class using the trait in /in/R1bKV on line 20 string(14) "NAME_SPACE\Bar" string(14) "NAME_SPACE\Bar"
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
string(14) "NAME_SPACE\Foo" string(14) "NAME_SPACE\Foo" string(20) "NAME_SPACE\{closure}" string(14) "NAME_SPACE\Bar" string(14) "NAME_SPACE\Bar"
Output for 5.5.21 - 5.5.38, 5.6.5 - 5.6.28
string(14) "NAME_SPACE\Foo" string(14) "NAME_SPACE\Foo" string(36) "NAME_SPACE\Bar::NAME_SPACE\{closure}" string(14) "NAME_SPACE\Bar" string(14) "NAME_SPACE\Bar"
Output for 5.5.0 - 5.5.20, 5.6.0 - 5.6.4
string(14) "NAME_SPACE\Bar" string(14) "NAME_SPACE\Foo" string(36) "NAME_SPACE\Bar::NAME_SPACE\{closure}" string(14) "NAME_SPACE\Bar" string(14) "NAME_SPACE\Bar"
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected 'class' (T_CLASS), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' in /in/R1bKV on line 9
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/R1bKV on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/R1bKV 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/R1bKV on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/R1bKV on line 3
Process exited with code 255.

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