Hi,
I have problem accessing object stored in session with PHP.
SUMMARY
*************
The doc says I must put the object definition
(require_once("MyObject.php");) before the session starts (with a
session_start() ). If I do that
- OK I can get my object from session
- OK my object is "casted" in MyObject object type
SAMPLE / the problem
***************************
But my code is organised in several sub-scripts (Object oriented, simplified
dor the explanation) :
The request.php is performed through part_1.php and part_2.php with 2
include calls
- request.php starts the session and do some initialization stuff.
- include("part_1.php")
do some business things here
call some object and try to read them from session
- include("part_2.php")
do some other logic here
end the response sent to the browser
As you already understand, the session starts BEFORE PHP enters part_1.php
and it is too late in part_1.php to put the object definition with the
require_once.
I cannot re organise my php files, since part_1.php is as its own business
logic and I want to use it elsewhere.
The object which is thus restored from session is not "finished". If I do a
var_dump on it I have something like :
object(__PHP_Incomplete_Class)(3) {
["__PHP_Incomplete_Class_Name"]=>
string(6) "classe"
["n"]=>
int(1)
["sub"]=>
object(__PHP_Incomplete_Class)(2) {
["__PHP_Incomplete_Class_Name"]=>
string(9) "subclasse"
["i"]=>
int(1)
}
}
instead of
object(classe)(2) {
["n"]=>
int(1)
["sub"]=>
object(subclasse)(1) {
["i"]=>
int(1)
}
}
It looks like there is a special intermediate object of type
__PHP_Incomplete_Class.
If another object is an attribut of the session stored object, it is also
incomplete.
If I try to call some methods on it it throws an error saying the object is
incomplete and I cannot call methods or attributs on it.
TEMPORARY SOLUTION
******************************
What I do actually is making a kind of copy of this object trough
introspection and explicit casting :
$myObject =& convert("MyObjet", $IncompleteClassInstance) ;
But :
- this is not very convenient
- the MyObject must support a constructor with no arguments since the
process of conversion is :
* create a new instance of MyObject with no arguments (new
MyObject( ); )
* copy the attributes of the incomplete instance in this new Instance
recurse if an attribute is itself another object
* return the new instance
QUESTIONS
***************
Any idea about standard object casting in PHP ?
The process between class def and session starting if my session is auto
started (change in my php.ini) results in an error.
Thus I can affirm there is a bug in the session handling of PHP :"It is not
possible to store object in session if we use auto started sessions"
Alex
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