ID: 42270
User updated by: steven dot mccoy at miru dot hk
Reported By: steven dot mccoy at miru dot hk
-Status: Feedback
+Status: Open
Bug Type: JSON related
Operating System: Ubuntu 7.04
PHP Version: 5.2.4RC1-dev
New Comment:
The situation I'm using it in is where the browser sends an array of
objects to PHP. The PHP scripts uses PEAR::DB_DataObject to generate an
array of objects inside a database table, I then use
array_diff/array_udiff to calculate what is new, what has changed, and
what should be deleted. The array_diff for items that have not changed
fails in 5.2 because PHP fails be able to compare some of the stdClass
objects.
$new_products = array_filter($products,
array('Order','is_new_product'));
debug('new_order_products: '.count($new_products).' found');
$old_products = array_diff($new_products, $products);
debug('old_order_products: '.count($old_products).' calculated');
$updated_products = array_udiff($old_products, $current_products,
array('Order', 'product_compare'));
debug('updated_order_products: '.count($updated_products).' found');
$deleted_products = array_udiff($current_products, $products,
array('Order', 'product_compare_by_id'));
debug('deleted_order_products: '.count($deleted_products).' found');
PEAR::DB_DataObject returns table rows as objects, the PHP JSON module
defaults to objects, but can include arrays of objects as shown
previously.
As a workaround I rebuilt PHP 5.1.6 from Ubuntu 6.10 on 7.04. If
someone can provide a array_udiff function that can compare objects like
before that would be great :-)
If the current circumstances are not clear, I will repeat: PHP 5.1.6
generates the expected result output as shown, PHP 5.2 does not.
Previous Comments:
------------------------------------------------------------------------
[2007-08-16 11:52:54] [EMAIL PROTECTED]
Here's what I get for the encode:
{"first":[{"second":2},"two","three"]}
So actually you have another object inside the first, here's
var_dump($obj);
object(stdClass)#1 (1) {
["first"]=>
array(3) {
[0]=>
object(stdClass)#2 (1) {
["second"]=>
int(2)
}
[1]=>
string(3) "two"
[2]=>
string(5) "three"
}
}
And using json_decode($json, true):
array(1) {
["first"]=>
array(3) {
[0]=>
array(1) {
["second"]=>
int(2)
}
[1]=>
string(3) "two"
[2]=>
string(5) "three"
}
}
So what's the bug?
------------------------------------------------------------------------
[2007-08-16 11:46:15] [EMAIL PROTECTED]
See also bug #42303
------------------------------------------------------------------------
[2007-08-13 21:34:06] crrodriguez at suse dot de
Workaround : use array_udiff with a supplied callback function or use
only arrays.
------------------------------------------------------------------------
[2007-08-12 06:54:01] steven dot mccoy at miru dot hk
Reproduced with the Win32 CVS build:
PHP 5.2.4RC1-dev (cli) (built: Aug 12 2007 00:04:25)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies
------------------------------------------------------------------------
[2007-08-11 06:13:57] steven dot mccoy at miru dot hk
Description:
------------
This might be related to bug 41221, upgrading from PHP 5.1.6-1 (Debian)
to 5.2.1 (Ubuntu) created a regression in handling output of JSON
decoding.
Does this mean that I can only use arrays ( json_decode($json, true) ),
and have to update all code appropriately?
Reproduce code:
---------------
<?php
$array = array(
"first" => array(array("second" => 2), "two",
"three"),
);
$json = json_encode($array);
$obj = json_decode($json);
var_dump(array_diff($array,$obj->first));
?>
Expected result:
----------------
array(1) {
["first"]=>
array(3) {
[0]=>
array(1) {
["second"]=>
int(2)
}
[1]=>
string(3) "two"
[2]=>
string(5) "three"
}
}
Actual result:
--------------
Catchable fatal error: Object of class stdClass could not be converted
to string in /tmp/- on line 7
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=42270&edit=1
