You have a DOMDocument that potentially contains UTF-8 encoded data (it might not however).
You want to search it via DOMXpath->query() using a value that comes from a $_POST value.
If the page that posts the data via a form to the search script IS NOT encoded in UTF-8, then the value must be converted to UTF-8 before it is used in the query expression.
Else, if the posting page IS UTF-8 encoded, then the $_POST data does not need to be converted before being used in the expression.
Is this correct?
Also, if the $_POST data comes from a UTF-8 encoded page, and it needs to be sanitized before use, will the basic PHP string functions work on the data (e.g. htmlentities, stripslashes, trim, preg_replace, etc)?
If not what do I have to do?
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