On 06/01/2017 14:03, Willian Veiga wrote:
Hello,
What do you think about a new method, called atXPath, that would return a
single SimpleXMLElement?
Details:
https://github.com/php/php-src/pull/1717
https://bugs.php.net/bug.php?id=45201
Thank you, Willian.
My first thought on this was "what does the 'at' mean?" I see now that
it's copied from another library, but "atXPath" really doesn't make me
think "xpath for single element".
My second thought is that this feature is actually no longer needed. The
original feature request was to avoid the need for an intermediate
variable when you know you're getting back one result:
$firstresult=$xml->xpath('element[@called="XYZ"]');
$secondresult=$firstresult[0]->xpath('child[@named="ABC"]');
$finalresult=$secondresult[0];
But in all versions of PHP since 5.4 you can simply add the [0] on the
end of the function call anyway:
$finalresult=$xml->xpath('element[@called="XYZ"]')[0]->xpath('child[@named="ABC"]')[0];
Like the original proposal for an extra parameter, this extends to
selecting whichever result you want, as long as you're sure it exists.
Example: https://3v4l.org/1k9rk
If you don't know for sure that there will be enough results, then
chaining will give an error either way, and this isn't really any
different from any other method that might or might not return the
expected object.
Regards,
--
Rowan Collins
[IMSoP]
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