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
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.