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run code in 150+ php & hhvm versions
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<?php class A { private $p1 = "secret"; public function B() { var_dump($this); ${'t' . 'his'} = 'hidden'; // works var_dump($this); var_dump($GLOBALS['this']); // class is global but $this is not since only refers to this particular object. $GLOBALS['this'] = 'lovely'; var_dump($this, $GLOBALS['this']); echo "$this {$this->p1}"; } } $a = new A; $a->B();
based on JCpBt
Output for 7.1.0
object(A)#1 (1) { ["p1":"A":private]=> string(6) "secret" } Fatal error: Uncaught Error: Cannot re-assign $this in /in/sqdPO:6 Stack trace: #0 /in/sqdPO(16): A->B() #1 {main} thrown in /in/sqdPO on line 6
Process exited with code 255.
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.0.14
object(A)#1 (1) { ["p1":"A":private]=> string(6) "secret" } string(6) "hidden" Notice: Undefined index: this in /in/sqdPO on line 8 NULL string(6) "hidden" string(6) "lovely" hidden secret
Output for hhvm-3.10.0 - 3.12.0
Fatal error: Cannot re-assign $this in /in/sqdPO on line 6
Process exited with code 255.
Output for 5.0.0 - 5.2.17
object(A)#1 (1) { ["p1:private"]=> string(6) "secret" } string(6) "hidden" Notice: Undefined index: this in /in/sqdPO on line 8 NULL string(6) "hidden" string(6) "lovely" hidden secret
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/sqdPO on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/sqdPO on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/sqdPO on line 3
Process exited with code 255.