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<?php class Foo { private $id; public function __construct() { $id = $used++; } public function getId() { return $id; } } $a = new Foo; // $a is a pointer pointing to Foo object 0 $b = $a; // $b is a pointer pointing to Foo object 0, however, $b is a copy of $a unlink($a); var_dump($b);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined variable $used in /in/ItKhC on line 6 Fatal error: Uncaught TypeError: unlink(): Argument #1 ($filename) must be of type string, Foo given in /in/ItKhC:15 Stack trace: #0 /in/ItKhC(15): unlink(Object(Foo)) #1 {main} thrown in /in/ItKhC on line 15
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: used in /in/ItKhC on line 6 Warning: unlink() expects parameter 1 to be a valid path, object given in /in/ItKhC on line 15 object(Foo)#1 (1) { ["id":"Foo":private]=> NULL }
Output for 7.3.32 - 7.3.33
Warning: unlink() expects parameter 1 to be a valid path, object given in /in/ItKhC on line 15 object(Foo)#1 (1) { ["id":"Foo":private]=> NULL }
Output for 5.3.0 - 5.3.29
Notice: Undefined variable: used in /in/ItKhC on line 6 Warning: unlink() expects parameter 1 to be string, object given in /in/ItKhC on line 15 object(Foo)#1 (1) { ["id":"Foo":private]=> NULL }
Output for 5.0.4 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Notice: Undefined variable: used in /in/ItKhC on line 6 Warning: unlink() expects parameter 1 to be string, object given in /in/ItKhC on line 15 object(Foo)#1 (1) { ["id:private"]=> NULL }
Output for 5.0.0 - 5.0.3
Notice: Undefined variable: used in /in/ItKhC on line 6 Warning: unlink() expects parameter 1 to be string, object given in /in/ItKhC on line 15 object(Foo)#1 (1) { ["id:private"]=> NULL }
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/ItKhC on line 4
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
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/ItKhC on line 4
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/ItKhC on line 4
Process exited with code 255.
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