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<?php class Foo implements Serializable { private $var1; public function __construct() { $this->var1 = array('ROLE_DEVELOPER'); } public function serialize() { return serialize(array($this->var1)); } public function unserialize($serialized) { list($this->var1) = unserialize($serialized); } } class Bar extends Foo { private $var2; public function __construct() { parent::__construct(); $this->var2 = new \stdClass(); } public function serialize() { return serialize(array($this->var2, parent::serialize())); } public function unserialize($serialized) { list($this->var2, $parentStr) = unserialize($serialized); parent::unserialize($parentStr); } } $foo = new Foo; var_dump(unserialize(serialize($foo)));
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Deprecated: Foo implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/Dqqon on line 3 Deprecated: Bar implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/Dqqon on line 20 object(Foo)#2 (1) { ["var1":"Foo":private]=> array(1) { [0]=> string(14) "ROLE_DEVELOPER" } }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
object(Foo)#2 (1) { ["var1":"Foo":private]=> array(1) { [0]=> string(14) "ROLE_DEVELOPER" } }
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Dqqon on line 27 object(Foo)#2 (1) { ["var1:private"]=> array(1) { [0]=> string(14) "ROLE_DEVELOPER" } }
Output for 5.0.5
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Dqqon on line 27 Fatal error: Interface 'Serializable' not found in /in/Dqqon on line 3
Process exited with code 255.
Output for 5.0.0 - 5.0.4
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/Dqqon on line 27 Fatal error: Class 'Serializable' not found in /in/Dqqon on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting '{' in /in/Dqqon on line 3
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 '{' in /in/Dqqon on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'{'' in /in/Dqqon on line 3
Process exited with code 255.

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