Get indexed content of a file based on filename - by: Nsenga Jimmy

Dear,

Could you help me with a PHP function to get the indexed content of a file by providing its "real filename"?
A function similar to the following one where the parameters are the iFile and the filename to process.

function getIndex($iFile, $realFilename)
{
// search the indexed content of $realFilename inside the iFile $iFile
....
return $indexedContent;
}

Thanks in advance