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<?php trait ClosureInATrait { public static function getClosureInTrait() { return function () { return [__CLASS__, self::class]; }; } } class ClassConstantTest { use ClosureInATrait; public static function getClosureInClass() { return function () { return [__CLASS__, self::class]; }; } } $closureInClass = ClassConstantTest::getClosureInClass(); $closureInTrait = ClassConstantTest::getClosureInTrait(); echo 'Before bind: ' . PHP_EOL; echo '__CLASS__ in class: ' . PHP_EOL; var_dump($closureInClass()); echo '__CLASS__ in Trait: ' . PHP_EOL; var_dump($closureInTrait()); $closureInClass = Closure::bind($closureInClass, null, 'stdClass'); $closureInTrait = Closure::bind($closureInTrait, null, 'stdClass'); echo PHP_EOL . 'After bind: ' . PHP_EOL; echo '__CLASS__ in class: ' . PHP_EOL; var_dump($closureInClass()); echo '__CLASS__ in Trait: ' . PHP_EOL; var_dump($closureInTrait());
Output for 7.0.0 - 7.1.0
Before bind: __CLASS__ in class: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(17) "ClassConstantTest" } __CLASS__ in Trait: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(17) "ClassConstantTest" } Warning: Cannot bind closure to scope of internal class stdClass in /in/KttEH on line 34 Warning: Cannot bind closure to scope of internal class stdClass in /in/KttEH on line 35 After bind: __CLASS__ in class: Fatal error: Uncaught Error: Function name must be a string in /in/KttEH:39 Stack trace: #0 {main} thrown in /in/KttEH on line 39
Process exited with code 255.
Output for hhvm-3.10.0 - 3.12.0
Before bind: __CLASS__ in class: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(17) "ClassConstantTest" } __CLASS__ in Trait: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(15) "ClosureInATrait" } After bind: __CLASS__ in class: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(17) "ClassConstantTest" } __CLASS__ in Trait: array(2) { [0]=> string(8) "stdClass" [1]=> string(15) "ClosureInATrait" }
Output for 5.5.24 - 5.6.28
Before bind: __CLASS__ in class: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(17) "ClassConstantTest" } __CLASS__ in Trait: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(17) "ClassConstantTest" } After bind: __CLASS__ in class: array(2) { [0]=> string(17) "ClassConstantTest" [1]=> string(17) "ClassConstantTest" } __CLASS__ in Trait: array(2) { [0]=> string(8) "stdClass" [1]=> string(8) "stdClass" }
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/KttEH on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/KttEH on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_STRING in /in/KttEH on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/KttEH on line 3
Process exited with code 255.