[TYPO3-bugs] #434: class.tslib_content.php function getUpdateJS produce JS error messages

[Thomas Hempel]

>>> I have found a very strange behaviour:
>>>
>>> function getUpdateJS($dataArray, $formName, $arrPrefix, $fieldList)    {
>>>         $JSPart='';
>>>         $updateValues=t3lib_div::trimExplode(',',$fieldList);
>>> $tmp = $updateValues;
>>>
>>> If I do not use the dummy line with $tmp, then the $updateValues is
>>> empty and no field values are shown in sr_feuser_register.
>>> This is with PHP Version 5.2.1. I have no explanation for this.
>> Looks like a PHP memory bug to me.
> 
> I can reproduce this bug on several TYPO3 installations. If you do not
> add this $tmp, then in sr_feuser_register it will always loose the
> password (shown as *****) after a reload of the page. And sometimes all
> fields will be empty even if a user has been logged in. This depends on
> the steps being done before.
I guess the problem is the following. If you simply use the result of trimExplode within a list() 
construct, the pointer is not at the beginning of the array.

As soon as you copy the stuff into a new variable, the pointer is set to 0 and than the list thing 
works as expected. Another solution would be to add a reset() instead of this $tmp stuff.

The solution for the core (see core list) is to don't use list but foreach.



Greets,
Thomas


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