Bug #62717 [Com]: BC: in PHP 5.4 empty() reports true for simplexmlelement

[ferca23 at gmail dot com]

Edit report at https://bugs.php.net/bug.php?id=62717&edit=1

 ID:                 62717
 Comment by:         ferca23 at gmail dot com
 Reported by:        php at sebastianmendel dot de
 Summary:            BC: in PHP 5.4 empty() reports true for
                     simplexmlelement
 Status:             Assigned
 Type:               Bug
 Package:            SimpleXML related
 PHP Version:        5.4.5
 Assigned To:        acurioso
 Block user comment: N
 Private report:     N

 New Comment:

I don't know if is exactly the same bug, but I have a similar problem.

The empty function is returning true when accessing the sub-elements using the 
main object, and is returning false when accessing the sub-elements using the 
variable containing the sub-element.

Example script:

$xmlstr = '<?xml version="1.0" standalone="yes"?>
<movies>
<movie>
    <title></title>
</movie>
</movies>';


$movies = new SimpleXMLElement($xmlstr);

$subelement = $movies->movie->title;

echo "Accesing normal: " . PHP_EOL;
echo var_dump($movies->movie->title) . PHP_EOL;
echo var_dump(empty($movies->movie->title)) . PHP_EOL;

echo "Accesing subelement: " . PHP_EOL;
echo var_dump($subelement) . PHP_EOL;
echo var_dump(empty($subelement)) . PHP_EOL;


Previous Comments:
------------------------------------------------------------------------
[2012-12-12 14:22:29] larue...@php.net

hey, acurioso, do you have time to look at this?

I assume this is introduced in 
https://github.com/php/php-src/commit/1e3b32c7

thanks

------------------------------------------------------------------------
[2012-12-12 11:47:07] jozef at react dot com

This bug was introduced in 5.4.0, as can be seen on:

http://3v4l.org/MEL9Y


for the following test:

$string = <<<XML
<a>
        <b>success</b>
</a>
XML;

$xml = new SimpleXMLElement($string);
$result = $xml->xpath('/a/b');

foreach ($result as $r)
{
    if (!empty($r))
    {
        print_r((string)$r);
    }
    else
    {
        echo 'failure';
    }
}

------------------------------------------------------------------------
[2012-08-01 14:37:54] php at sebastianmendel dot de

Description:
------------
When laoding XML into SimpleXMLElement and iterating with ->children() empty() 
reports true for SimpleXMLElement objects.

In PHP 5.3.16 empty() returns false.
In PHP 5.4.5 empty() returns true.

Test script:
---------------
$xml = <<<EOT
<?xml version="1.0" ?>
<Y><X>6098881</X></Y>
EOT;

$sxml = new SimpleXMLElement($xml);

foreach ($sxml->children() as $xmlKey => $xmlNode) {
    var_dump(
        empty($xmlNode), (string) $xmlNode, $xmlNode->asxml()
    );
}

$xmlNode = new SimpleXMLElement('<X>501936634a721</X>');
var_dump(
    empty($xmlNode), (string) $xmlNode, $xmlNode->asxml()
);

Expected result:
----------------
bool(false)
string(7) "6098881"
string(14) "<X>6098881</X>"
bool(false)
string(13) "501936634a721"
string(43) "<?xml version="1.0"?>
<X>501936634a721</X>
"


Actual result:
--------------
bool(true)
string(7) "6098881"
string(14) "<X>6098881</X>"
bool(false)
string(13) "501936634a721"
string(43) "<?xml version="1.0"?>\n<X>501936634a721</X>\n"



------------------------------------------------------------------------



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Edit this bug report at https://bugs.php.net/bug.php?id=62717&edit=1