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I have a large HTML file, containing a lot of content. I want to get a JavaScript variable, named 'a' for example, from the whole file.
Example: (deleted lots of the actual content)
<html>
<head>
<script>
var a = [{'a': 1, 'b': 2}];
</script>
</head>
<body>
....
</body>
</html>
What should come from the above is:
[{'a': 1, 'b': 2}]
759
preg_match('#var a = (.*?);\s*$#m', $html, $matches);
echo $matches[1];
Explanation:
var a =
;, any amount of spaces \s*, then the end of the line $
m modifier will try to match each line independently, without it, the $ would just match then end of the string which would be a bit uselessThe any amount of spaces is only there in case you have some spaces after the definition, no other reason (e.g. human error). If you're sure that won't happen, you can remove \s*.
Note that this doesn't replace a full-blown parser. You will need to make modifications if a is defined over more than one line, if a is defined more than once (think about scope, you can have var a on a global scope, then var a within a function), etc.
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