Re: Perplexing crash with 5.2.9+ php5ts.dll

Richard Quadling wrote:

> OK, so far so good.
> 
> Now create a simple PHP script which you can run at the command line
> which you think will cause the issue.
> 
> If you can produce a simple test case, then allow us to run it to see
> if it is reproducible.
> 

Okay, found the problem; it's with simplexml_load_string() and with some bad code.

simplexml_load_string() under 5.2.8 will return a proper SimpleXMLElement
object from a non-UTF-16-encoded bit of XML, even though the XML says that it
*is* encoded with UTF-16.

Under 5.2.9+, simplexml_load_string() tosses a warning and returns FALSE.

Apache was crashing because a poorly written SimpleXMLtoArray() function was
recursively calling itself without checking the arguments first.  I suspect it
simply ran out of memory, but I didn't step through it enough times to verify.

Here's a bit of code that can reproduce the "problem":


$xmlstr = '<?xml version="1.0" encoding="utf-16"?><foo
xmlns="http://www.foo.com/service"><bar name="foobar"></bar></foo>';
$xml = simplexml_load_string( $xmlstr, "SimpleXMLElement", LIBXML_NOCDATA );


Why the change in encoding-handling between the PHP versions?  I can't see
anything in the 5.2.9 Changelog that would affect this.

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