解析来自 stackoverflow.com 的 rss 时出错。在 PHP 中使用 SimpleXML

Question

我试图从http://stackoverflow.com 解析标签 PHP 的 rss，并尝试使用 DOM 模型以外的东西，所以我研究了 SimpleXML。这是我的代码：

<?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;
?>

但是屏幕上什么都没有显示，也没有错误显示！ 来自https://stackoverflow.com/feeds/tag/php 的样本数据可以在以下位置找到 http://gourabt2.cloudapp.net/sample-data/sample_data.xml

任何帮助将不胜感激！谢谢！干杯！

Answer 1

您在 SimpleXML 中使用数组访问来访问 属性 所以：

$loaded["entry"]

从文档元素返回名为“entry”的属性。

使用箭头访问来获取名为 "entry" 的元素：

$loaded->entry

这会返回名为“entry”的元素。

另外注意命名空间。现有的问答材料中已经概述了使用 SimpleXML 解析提要，请与之相关。

Answer 2

试试这个。

<?php
    $xml = file_get_contents('http://stackoverflow.com/feeds/tag/php');
    $loaded = simplexml_load_string($xml) or die("There is a problem");
    foreach($loaded->entry as $post) {
       echo $post->title . "\n";
    }

输出：

join 2 tables - group by id order by date price asc
using php variable in an sql query
Clear browser cache memory by php code
There is a error in parsing the rss from stackoverflow.com. using SimpleXML in PHP
Modify Laravel Validation message response
chained dropdown from database
Php database handling
How to load model with Codeigniter Webservice - Nusoap Server?
multiple report download php adwords api
Unable to confirm Amazon SNS subscription for SES bounces
Comparing if values exist in database
Better way to CURL to WCF
PHP SaaS Facebook app: Host Page Tab ID and User ID
PHP and Mysql - running over PDOStatement
How to change form textbox value in Zend form annotation?
connect Android with PHP, MySQL , unfortunately app has stopped in android emulator
Auto increment a SESSION key ID
Call PHP function in a class from a HTML form
PHP SQL Preventing Duplicate User names: Catching Exception vs Select Query
I am only able to grab the first group of text in between the tr need helping fixing my code
How to run an external program in php
How to connect to php in android using an async task?
PHP Return HTML (Laravel / Lumen Framework)
prestashop smarty if statement
Cakephp OR condition Implementation
Progress bar HTML5/PHP
preg_match file url from jwplayer
Does Cloudflare Cache HTML5 Video Embedded on PHP Page?
how to INSERT INTO JOIN
PHP web service returns "403 forbidden" error

Answer 3

那是因为你走错了路。这是更正。

(string)$loaded->entry->title;