避免在php中使用DOMDocument XML警告

I'm fetching xml files from a server and sometimes I'm getting a non-valid xml files, because of this I'm getting a warning:

我从服务器获取xml文件，有时我得到一个无效的xml文件，因此我收到一个警告：

Warning: DOMDocument::load() [domdocument.load]: Start tag expected, '<' not found in

How can I catch this warning and delete the file?

如何捕获此警告并删除文件？

3 个解决方案

#1

You have two choices. Either use the @ error control operator in your load() call, e.g. @$dom->load(), which is somewhat slow because it globally changes the value of display_errors to off, executes the function and sets it back to on.

你有两个选择。在load（）调用中使用@ error control运算符，例如@ $ dom-> load（），这有点慢，因为它全局地将display_errors的值更改为off，执行该函数并将其重新设置为on。

The other option, which I personally prefer (I hate the @ operator, I can't stand to see it in my code) is to save the old value of libxml_use_internal_errors, enable it using libxml_use_internal_errors(TRUE), call the function, clear the errors buffer and restore the old value. Here's a snippet from my code that does that:

另一个选项，我个人更喜欢（我讨厌@运算符，我无法忍受在我的代码中看到它）是保存libxml_use_internal_errors的旧值，使用libxml_use_internal_errors（TRUE）启用它，调用函数，清除错误缓冲并恢复旧值。这是我的代码中的代码段：

<?php
$previous_value = libxml_use_internal_errors(TRUE);
$doc->loadHTML((string)$e->response->getBody());
libxml_clear_errors();
libxml_use_internal_errors($previous_value);

I can't comment on answers yet, so I'll write it here:

我还不能评论答案，所以我会在这里写一下：

Michael solution makes it less strict, but it'll still issue warnings for some of the errors:
迈克尔解决方案使其不那么严格，但它仍然会发出一些错误的警告：

nadav@shesek:~$ php -r '$dom=new DOMDocument; $dom->strictErrorChecking = FALSE ; $dom->loadHTML("<xy></zx>");'
PHP Warning:  DOMDocument::loadHTML(): Tag xy invalid in Entity, line: 1 in Command line code on line 1

DON'T do what Fran Verona suggested - globally disabling error reporting is something you should never do. In production, set your own error handler and display a prettier message to the user, and make sure the error is logged somewhere - but never disable it completely. Setting error_reporting to 0 will cause PHP to disable error logging too.
不要做弗兰维罗纳建议的 - 全局禁用错误报告是你永远不应该做的事情。在生产中，设置自己的错误处理程序并向用户显示更漂亮的消息，并确保在某处记录错误 - 但永远不要完全禁用它。将error_reporting设置为0将导致PHP也禁用错误日志记录。
Xeon06 solution is problematic because you're effecting the entire script error handler for a specific piece of code. Using your own error handler that simply ignores the error causes the same issues as Fran's solution.
Xeon06解决方案存在问题，因为您正在影响特定代码段的整个脚本错误处理程序。使用您自己的错误处理程序只是忽略错误导致与Fran的解决方案相同的问题。

#2

Use set_error_handler.

使用set_error_handler。

set_error_handler("yourHandler", E_WARNING);

#3

Turn off strict error checking:

关闭严格的错误检查：

$dom = new DOMDocument();
$dom->strictErrorChecking = FALSE ;

$dom->load('/path/to/file.xml');
if (!$dom->validate()) {
   // Invalid XML!
}

#1

<?php
$previous_value = libxml_use_internal_errors(TRUE);
$doc->loadHTML((string)$e->response->getBody());
libxml_clear_errors();
libxml_use_internal_errors($previous_value);