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    $fp = fopen("iptlogfile.txt", "w+");
    
    print "<pre>" . print_r($fp) . "</pre>";
    $data = fread($fp, "706220");
    
    print $data;
    
    $data = str_replace($fromstr, $tostr, $data);
    
    print $data;
    fwrite($fp, $data);
    fclose($fp);