从stackoverflow.com解析rss时出错。 在PHP中使用SimpleXML

Question

I was trying to parse the rss of the tag PHP, from http://stackoverflow.com and tried to use something other than DOM Model, So I looked into SimpleXML. THis is my code:

<?php
    error_reporting(-1);
    $xml = file_get_contents('https://stackoverflow.com/feeds/tag/php');
    $loaded = simplexml_load_string($xml) or die("There is a problem");
    $str1 = $loaded["entry"]["entry"][0]->title;
    echo $str1;
?>

But nothing is displayed on the screen, and also no error is displayed! The sample data from https://stackoverflow.com/feeds/tag/php can be found at http://gourabt2.cloudapp.net/sample-data/sample_data.xml

Any Help would be very much appreciated! Thanks! Cheers!

Answer 1

You use array-access in SimpleXML to access attributes so:

$loaded["entry"]

returns the attribute named "entry" from the document element.

use arrow-access to get the element named "entry" instead:

$loaded->entry

this returns the element named "entry".

Additionally take care with namespaces. Parsing a feed with SimpleXML has been outlined already in existing Q&A material, please relate to it.