在内联javascript中获取变量的值

i am building web app and at some point i need to scrape the value of variable called fid from remote page this variable present in script like this:

<script type="text/rocketscript">fid="mytarget"; v_width=640; v_height=360;</script>

i have tried using xpath and i come with the code below:

$fid = $xpath->xpath_query("/body/script[contains(local-name(), 'fid')]", 1)->nodeValue;

but no luck

any help appretaited

dongle3217
dongle3217 显示此HTML页面,并显示PHP代码的最小,完整和可验证的示例。
5 年多之前 回复

1个回答

We have to guess most of your input document and code. I doubt that body is the outermost element of that HTML document though.

A meaningful Xpath expression to search for this script element would be

//script[contains(., 'fid')]

This will find script element anywhere in the document if their text content includes fid. By the way: local-name() returns the local part of the name of the context node - which is not what you want.


EDIT

So, assuming the following document (please do not post code as links!):

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-gb" lang="en-gb" dir="ltr">

<head>
    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
</head>

<body class="contentpane">
    <script type="text/rocketscript">fid="mytarget"; v_width=640; v_height=360;</script>
    <script type="text/rocketscript" data-rocketsrc="http://remotesite.com/js.js"></script>
</body>

</html>

You can retrieve the value of fid with

substring-before(substring-after(//*[local-name() = 'script' and contains(.,'fid')],'='),';')

which will return

"mytarget"

Without the quotes:

substring-before(substring-after(//*[local-name() = 'script' and contains(.,'fid')],'"'),'"')

Caveat: In some environments, double quotes must be represented differently.

There is a namespace in your document and the path expression above is ignoring that namespace. The proper way to address this would be to register this namespace and use a prefix in the path expression.

douzhouhan4618
douzhouhan4618 此路径表达式不依赖于输入文档的特定结构 - 它已经非常通用。 你是什​​么意思“HTML有时会错过一些元素”?
5 年多之前 回复
dshun123456
dshun123456 很抱歉在很长一段时间之后乞求这个但是你的解决方案只有在html完全格式化时才有效,而且总是有时html错过了一些元素,在这种情况下上面的解决方案不起作用你有什么工作吗 ?
5 年多之前 回复
duanli0162
duanli0162 非常感谢这很有效,并获得没有引号的fid值
5 年多之前 回复
dongxi0523
dongxi0523 那么,预期产量到底是什么? mytarget?
5 年多之前 回复
duanmu2941
duanmu2941 这里是html代码pastebin.com/FbVRTjkC我想要fid的文本值
5 年多之前 回复
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