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<?php trait AccessibleProperties { public function __isset($property) { return property_exists($this, $property); } public function __get($property) { if (property_exists($this, $property)) { return $this->$property; } } } class Fooba { use AccessibleProperties; protected $a = 'Some value'; } $foo = new Fooba; var_dump($foo->a); var_dump(isset($foo->a));
based on ei6MK
Output for 5.4.0 - 7.2.13, 7.3.1 - 7.4.0
string(10) "Some value" bool(true)
Output for 7.3.0
Fatal error: Uncaught Error: Cannot access protected property Fooba::$a in /in/0jmp1:25 Stack trace: #0 {main} thrown in /in/0jmp1 on line 25
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/0jmp1 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/0jmp1 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/0jmp1 on line 3
Process exited with code 255.