php 如何将 XML 字符串回显到 HTML 页面以进行调试？
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How to echo an XML string to an HTML page for debugging?
提问by jcmitch
Okay so I have a php script and I need to somehow view the value of one of my variables. The thing is this variable is a very long string of XML that got returned from a server. I know it has an error message in it but I need to actually see what it is saying. If I try and Print or echo the value it only displays part followed by a ... or if I use var_dump it does the same. I've even gone as far as trying to echo a javascript alert with the value but that fails because there are single and double quotes in the xml causing the alert quotes not to be recognized correctly. I just need to see the value of this variable. Any advice? Thanks.
好的，所以我有一个 php 脚本，我需要以某种方式查看我的一个变量的值。问题是这个变量是从服务器返回的很长的 XML 字符串。我知道其中有一条错误消息，但我需要实际看看它在说什么。如果我尝试打印或回显值，它只显示部分后跟一个 ... 或者如果我使用 var_dump 它会做同样的事情。我什至试图用该值回显 javascript 警报，但失败了，因为 xml 中存在单引号和双引号，导致警报引号无法正确识别。我只需要查看这个变量的值。有什么建议吗？谢谢。
Edit: Actually said that wrong. Echo and print don't display the value correctly because the tags are in <> brackets so it is recognizing as an html tag.
编辑：实际上说错了。Echo 和 print 无法正确显示值，因为标签位于 <> 括号中，因此它被识别为 html 标签。
回答by nickb
You can use htmlentitiesto output the XML string so that you can get a plaintext view of it in a browser.
您可以使用htmlentities输出 XML 字符串，以便您可以在浏览器中获得它的纯文本视图。
<?php echo htmlentities( $xml_string); ?>
Alternatively, you can parse the XML string to reveal the error message, but this may be more complicated than what you need.
或者，您可以解析 XML 字符串以显示错误消息，但这可能比您需要的更复杂。
回答by simshaun
Try echo htmlentities($var, ENT_COMPAT, 'UTF-8')
尝试 echo htmlentities($var, ENT_COMPAT, 'UTF-8')
回答by wens
i always use this:
我总是用这个：
echo "<pre>". htmlentities($s) . "</pre>";
回答by Nikolay Baluk
Try this:
尝试这个：
echo '<pre>'.$xml_string.'</pre>';
See also: CDATA - (Unparsed) Character Data
另请参阅： CDATA -（未解析的）字符数据
回答by Puggan Se
i usaly use:
我通常使用：
echo nl2br(str_replace('<', '<', $xml));
as its only the < that are a problem
因为它唯一的 < 是一个问题
回答by Jürgen Thelen
You could just save the XML string to a file. If it's well-formed XML, you can view it with every browser (and expand/collapse nodes ^^).
您可以将 XML 字符串保存到文件中。如果它是格式良好的 XML，您可以使用每个浏览器查看它（并展开/折叠节点 ^^）。
