ID: 28106 Comment by: antonr at game dot permonline dot ru Reported By: kupka at learninglab dot de Status: Open Bug Type: Zend Engine 2 problem Operating System: Mac OS X PHP Version: 5.0.0RC2 New Comment:
So, there is a problem with serialization and deserialization of objects with references to others objects. Previous Comments: ------------------------------------------------------------------------ [2004-05-08 10:27:17] antonr at game dot permonline dot ru 5.0.0 RC2, Win32 ---------------------------------- <?php class MyClass { public $number; function EchoNum() { echo $this->number; echo "<br>"; } } $a = new MyClass; $a->number = 1; $b = $a; $b->number = 2; $a->EchoNum(); $b->EchoNum(); ?> outputs: 2 2 ---------------------------------- but... <?php class MyClass1 { public $myclass2; } class MyClass2 { public $myclass1; } $a = new MyClass1; $a->myclass2 = new MyClass2; $a->myclass2->myclass1 = $a; $a->number = 1; echo $a->myclass2->myclass1->number; echo "<br>"; $c = serialize($a); echo $c; echo "<br><br>"; $b = unserialize($c); $b->number = 2; echo $b->number; echo "<br>"; echo $b->myclass2->myclass1->number; echo "<br>"; echo "<br>"; ?> outputs: 1 O:8:"MyClass1":2:{s:8:"myclass2";O:8:"MyClass2":1:{s:8:"myclass1";O:8:"MyClass1":2:{s:8:"myclass2";r:2;s:6:"number";i:1;}}s:6:"number";i:1;} 2 1 ---------------------------------- while: <?php class MyClass1 { public $myclass2; } class MyClass2 { public $myclass1; } $a = new MyClass1; $a->myclass2 = new MyClass2; $a->myclass2->myclass1 = &$a; <--- ampersand symbol added $a->number = 1; echo $a->myclass2->myclass1->number; echo "<br>"; $c = serialize($a); echo $c; echo "<br><br>"; $b = unserialize($c); $b->number = 2; echo $b->number; echo "<br>"; echo $b->myclass2->myclass1->number; echo "<br>"; echo "<br>"; ?> works fine and outputs: 1 O:8:"MyClass1":2:{s:8:"myclass2";O:8:"MyClass2":1:{s:8:"myclass1";r:1;}s:6:"number";i:1;} 2 2 ------------------------------------------------------------------------ [2004-04-26 10:31:19] kupka at learninglab dot de In PHP 5 Release Candidate 2 the problem still exists. The second script generates three different CStore objects, but there should only be one CStore objec and the two CHello objects should have a pointer to the same CStore object. ------------------------------------------------------------------------ [2004-04-25 16:48:45] kupka at learninglab dot de The second script: session_start(); $store->value = 123; echo "store id: $store<br>"; $store->object1->hello(); $store->object2->hello(); ------------------------------------------------------------------------ [2004-04-22 13:34:09] kupka at learninglab dot de Description: ------------ You have a main object which includes some other objects. This object is stored in the session. The other objects have a reference to the main object. If you start a new session these references should point to the main object. If you pass the objects to the main object in the old style with "&" this works fine. If you use the new style without "&" it doesn't work as exspected. Reproduce code: --------------- The classes: class CHello { var $store; // this doesn't work as exspected public function CHello($store) { $this->store = $store; } /* // this works fine public function CHello(&$store) { $this->store =& $store; } */ public function hello( ) { $v = $this->store->value; echo "Hello World: value is $v. (store id: $this->store)<br>"; } } class CStore { var $object1; var $object2; var $value = 0; } --------------------------- The first script: session_start(); $store = new CStore; $hello1 = new CHello($store); $hello2 = new CHello($store); $store->value = 999; $store->object1 = $hello1; $store->object2 = $hello2; echo "store id: $store<br>"; $store->object1->hello(); $store->object2->hello(); session_register("store"); --------------------------- The second script: session_start(); $store->value = 123; echo "store id: $store<br>"; echo $store->object1->hello(); echo $store->object2->hello(); Expected result: ---------------- The first script where the objects are generated: store id: Object id #4 Hello World: value is 999. (store id: Object id #4) Hello World: value is 999. (store id: Object id #4) The second script: store id: Object id #1 Hello World: value is 123. (store id: Object id #1) Hello World: value is 123. (store id: Object id #1) Actual result: -------------- The first script where the objects are generated: store id: Object id #6 Hello World: value is 999. (store id: Object id #6) Hello World: value is 999. (store id: Object id #6) The second script: store id: Object id #1 Hello World: value is 999. (store id: Object id #3) Hello World: value is 999. (store id: Object id #5) ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=28106&edit=1