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<?php trait CastableBehavior { public static function getFromContext($obj) { $casted = new $this; foreach (get_object_vars($obj) as $key => $value) { $casted->$key = $value; } return $casted; } } interface UserTypes { const USER = 1; const ADMIN = 2; const MODERATOR = 3; } class User { private $id; private $name; private $type; public function __construct($id, $name, $type) { $this->id = $id; $this->name = $name; $this->type = $type; } public function getID() { return $this->id; } public function getName() { return $this->name; } public function getType() { return $this->type; } } class Admin { use CastableBehavior; private $id; private $name; private $type; } $user = new User(2, 'John', UserTypes::ADMIN); if ($user->getType() === UserTypes::ADMIN) { $admin = Admin::getFromContext($user); } var_dump($admin);
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 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: Using $this when not in object context in /in/VUAft:4 Stack trace: #0 /in/VUAft(53): Admin::getFromContext(Object(User)) #1 {main} thrown in /in/VUAft on line 4
Process exited with code 255.
Output for 7.0.0 - 7.0.33
Notice: Undefined variable: this in /in/VUAft on line 4 Fatal error: Uncaught Error: Class name must be a valid object or a string in /in/VUAft:4 Stack trace: #0 /in/VUAft(53): Admin::getFromContext(Object(User)) #1 {main} thrown in /in/VUAft on line 4
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
Notice: Undefined variable: this in /in/VUAft on line 4 Fatal error: Class name must be a valid object or a string in /in/VUAft on line 4
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, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_STRING in /in/VUAft on line 2
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/VUAft on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/VUAft on line 2
Process exited with code 255.
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