PHP 错误：DOMDocument::loadXML() [domdocument.loadxml]：需要开始标记，在实体中找不到“<”
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PHP Error: DOMDocument::loadXML() [domdocument.loadxml]: Start tag expected, '<' not found in Entity
提问by Hearaman
Please check this bellow program.
请检查这个波纹管程序。
::Program::
：：程序：：
<?php
$xml='
<books>
<book>
<name>Java complete reference</name>
<cost>256</cost>
</book>
<book>
<name>Head First PHP and Mysql</name>
<cost>389</cost>
</book>
</books>';
$dom=new DOMDocument();
$dom->loadXML($xml);
foreach ($dom->getElementsByTagName('book') as $book)
{
foreach($book->getElementsByTagName('name') as $name)
{
$names[]=$name->nodeValue;
}
foreach($book->getElementsByTagName('cost') as $cost)
{
$costs[]=$cost->nodeValue;
}
}
print_r($names);
?>
It is shows error:
它显示错误：
DOMDocument::loadXML() [domdocument.loadxml]: Start tag expected, '<' not found in Entity
DOMDocument::loadXML() [domdocument.loadxml]：需要开始标记，在实体中找不到“<”
Is this correct way to do this?
这是正确的方法吗？
If it is correct, Is there any way to get the proper result without changing this <to <and >to >?
如果它是正确的，有没有什么办法让没有这种改变正确的结果<，以<及>对>？
回答by Trott
You should not be using character entities for <and >on things that are actually XML tags in the string that represents your XML. It should be this:
你不应该使用字符实体<和>对事情实际上是代表你的XML字符串中的XML标记。应该是这样的：
$xml='
<books>
<book>
...
Do that and the warning goes away.
这样做，警告就会消失。
You only need to use character entities for <and >when they are part of the actual data rather than delimiting an XML tag.
你只需要使用字符实体<和>当他们的实际数据的一部分，而不是划定一个XML标签。
回答by PeeHaa
DOMDocument expects the string to be VALID xml.
DOMDocument 期望字符串为 VALID xml。
Your string isn't a valid XML string. You should just use <in stead of <
您的字符串不是有效的 XML 字符串。你应该只用<代替<
Why would you have the htmlentities in that string?
为什么要在该字符串中包含 htmlentities？
回答by Hearaman
Thank you all. Just now i have tried with the method "html_entity_decode()". It is worked for me for this example.
谢谢你们。刚才我尝试了“html_entity_decode()”方法。对于这个例子，它对我有用。
::Code::
：：代码：：
<?php
$xml='
<books>
<book>
<name>Java complete reference</name>
<cost>256</cost>
</book>
<book>
<name>Head First PHP and Mysql</name>
<cost>389</cost>
</book>
</books>';
$xml=html_entity_decode($xml);
$dom=new DOMDocument();
$dom->loadXML($xml);
foreach ($dom->getElementsByTagName('book') as $book)
{
foreach($book->getElementsByTagName('name') as $name)
{
$names[]=$name->nodeValue;
}
foreach($book->getElementsByTagName('cost') as $cost)
{
$costs[]=$cost->nodeValue;
}
}
print_r($names);
?>
回答by Fredy31
Aren't you supposed to start with something like this
你不应该从这样的事情开始吗？
<?xml version="1.0" encoding="UTF-8" ?>
to create valid XML? That might be the missing start tag your error is talking about.
创建有效的 XML？这可能是您的错误所谈论的缺少开始标签。
