PHP SimpleXML错误

Question

我对SimpleXML解析器有一个很大的问题(至少对我来说是这样)。错误是：

Warning: simplexml_load_file(): file.meta:16: parser error : StartTag: invalid element name in index.php on line 89

Warning: simplexml_load_file(): <335> in index.php on line 89

Warning: simplexml_load_file(): ^ in index.php on line 89

Warning: simplexml_load_file(): file.meta:18: parser error : expected '>' in index.php on line 89

Warning: simplexml_load_file(): in index.php on line 89

Warning: simplexml_load_file(): ^ in index.php on line 89

Warning: simplexml_load_file(): file.meta:18: parser error : Opening and ending tag mismatch: Sequence line 15 and unparseable in index.php on line 89

Warning: simplexml_load_file(): in index.php on line 89

Warning: simplexml_load_file(): ^ in index.php on line 89

Warning: simplexml_load_file(): file.meta:19: parser error : StartTag: invalid element name in index.php on line 89

Warning: simplexml_load_file(): <337> in index.php on line 89

Warning: simplexml_load_file(): ^ in index.php on line 89

Warning: simplexml_load_file(): file.meta:21: parser error : expected '>' in index.php on line 89

Warning: simplexml_load_file(): in index.php on line 89

Warning: simplexml_load_file(): ^ in index.php on line 89

Warning: simplexml_load_file(): file.meta:21: parser error : Opening and ending tag mismatch: MetaAttack line 2 and unparseable in index.php on line 89

Warning: simplexml_load_file(): in index.php on line 89

Warning: simplexml_load_file(): ^ in index.php on line 89

Warning: simplexml_load_file(): file.meta:21: parser error : Extra content at the end of the document in index.php on line 89

Warning: simplexml_load_file(): in index.php on line 89

Warning: simplexml_load_file(): ^ in index.php on line 89

Warning: Invalid argument supplied for foreach() in index.php on line 97

我用谷歌搜索过了，但一无所获。我还搜索了XML标记声明(可能禁止声明数字标记)，但什么也没找到。您可以在下面找到我的xml (.meta)文件：

<?xml version="1.0"?>                                                                                                                                                   
<MA>
    <Count>
        3
    </Count>
    <Duration>
        34
    </Duration>
    <End>
        1315815814
    </End>
    <Start>
        1315815780
    </Start>
    <Sequence>
        <335>
            1315815794
        </335>
        <337>
            1315815814
        </337>
        <336>
            1315815804
        </336>
    </Sequence>
</MA>

在第89行：

$ma = simplexml_load_file("file.meta");

任何答案都是值得感谢的。提前谢谢。;)

Answer 1

在标记名中使用数字是可以的-但以数字开头是不可以的……

http://www.w3schools.com/xml/xml_elements.asp

XML命名规则

XML元素必须遵循以下命名规则：

• 名称可以包含字母、数字和其他characters
• Names不能以数字开头或标点符号character
• Names不能以字母XML (或Xml等)开头
• 名称不能包含空格

可以使用任何名称，不保留任何单词。

Answer 2

您不能将数字作为元素名称。从Wikipedia article on XML

元素标记区分大小写；开始标记和结束标记必须完全匹配。标记名不能包含任何字符!"#$%&'()*+，/;<=>?@[]^`{|}~，也不能包含空格字符，不能以-，.，或数字开头。

Answer 3

当然，你不应该以数字开头命名你的标签。这是一个问题。我建议您更改XML结构，因为它现在处理起来一点也不方便。例如：

<?xml version="1.0"?>
<MA>
    <Count>3</Count>
    <Duration>34</Duration>
    <End>1315815814</End>
    <Start>1315815780</Start>
    <Sequence>
        <value index="335">1315815794</value>
        <value index="336">1315815814</value>
        <value index="337">1315815804</value>
    </Sequence>
</MA>

然后，您可以使用以下代码非常容易地处理此XML：

$ma = simplexml_load_file("file.meta");
$sequence = $ma->xpath('Sequence/value');

foreach ($sequence as $el)
{
    echo "Index: {$el['index']}, value: $el <br>";
}

它将输出：

Index: 335, value: 1315815794 
Index: 336, value: 1315815814 
Index: 337, value: 1315815804