private function pdf2string($sourcefile) {          
      $fp = fopen($sourcefile, 'rb'); 
      $content = fread($fp, filesize($sourcefile)); 
      fclose($fp);
 
      $searchstart = 'stream'; 
      $searchend = 'endstream'; 
      $pdfText = ''; 
      $pos = 0; 
      $pos2 = 0; 
      $startpos = 0; 
 
      while ($pos !== false && $pos2 !== false) { 
         $pos = strpos($content, $searchstart, $startpos); 
         $pos2 = strpos($content, $searchend, $startpos + 1); 
         if ($pos !== false && $pos2 !== false){ 
            if ($content[$pos] == 0x0d && $content[$pos + 1] == 0x0a) { 
               $pos += 2; 
            } else if ($content[$pos] == 0x0a) { 
               $pos++; 
            } 
            if ($content[$pos2 - 2] == 0x0d && $content[$pos2 - 1] == 0x0a) { 
               $pos2 -= 2; 
            } else if ($content[$pos2 - 1] == 0x0a) { 
               $pos2--; 
            } 
            $textsection = substr( 
               $content, 
               $pos + strlen($searchstart) + 2, 
               $pos2 - $pos - strlen($searchstart) - 1 
            ); 
            $data = @gzuncompress($textsection);
            //$data = $textsection; 
            $pdfText .= self::pdfExtractText($data); 
            $startpos = $pos2 + strlen($searchend) - 1; 
         } 
      } 
      return preg_replace('/(\s)+/', ' ', $pdfText); 
   } 
 
   private function pdfExtractText($psData){ 
      if (!is_string($psData)) { return '';  } 
      $text = ''; 
      // Handle brackets in the text stream that could be mistaken for 
      // the end of a text field. I'm sure you can do this as part of the 
      // regular expression, but my skills aren't good enough yet. 
      $psData = str_replace('\)', '##ENDBRACKET##', $psData); 
      $psData = str_replace('\]', '##ENDSBRACKET##', $psData); 
 
      preg_match_all( 
         '/(T[wdcm*])[\s]*(\[([^\]]*)\]|\(([^\)]*)\))[\s]*Tj/si', 
         $psData, 
         $matches 
      ); 
      for ($i = 0; $i < sizeof($matches[0]); $i++) { 
         if ($matches[3][$i] != '') { 
            // Run another match over the contents. 
            preg_match_all('/\(([^)]*)\)/si', $matches[3][$i], $subMatches); 
            foreach ($subMatches[1] as $subMatch) { 
               $text .= $subMatch; 
            } 
         } else if ($matches[4][$i] != '') { 
            $text .= ($matches[1][$i] == 'Tc' ? ' ' : '') . $matches[4][$i]; 
         } 
      } 
      // Translate special characters and put back brackets. 
      $trans = array( 
         '\221'            => chr(145), 
         '\222'            => chr(146), 
         '\223'            => chr(147), 
         '\224'            => chr(148), 
         '\226'            => '-', 
         '\267'            => '•',
         '\('            => '(', 
         '\['            => '[', 
         '##ENDBRACKET##'   => ')', 
         '##ENDSBRACKET##'   => ']', 
         chr(133)         => '-', 
         chr(141)         => chr(147), 
         chr(142)         => chr(148), 
         chr(143)         => chr(145), 
         chr(144)         => chr(146),
         "'"               => '"',
         ".."            => ' ',
         chr(13)            => ' ',
         chr(10)            => ' ',
         chr(9)            => ' ',
         '\340'            => 'a',         // à      |http://www.the-art-of-web.com/html/character-codes/...
         chr(224)         => 'a',
         '\341'            => 'a',         // á
         chr(225)         => 'a',
         '\225'            => chr(149),   // *
         '\304'            => chr(196),   // Ä
         '\344'            => chr(228),   // ä
         '\374'            => chr(252),   // ü
         '\334'            => chr(220),   // Ü
         '\366'            => chr(246),   // ö
         '\326'            => chr(214),   // Ö
         '\337'            => chr(223),   // ß
         '\44'            => chr(36),      // $
         '\45'            => chr(37),      // %
         '\251'            => chr(169),   // ©
         '\256'            => chr(174),   // ®
         '\74'            => chr(60),      // <
         '\76'            => chr(62),      // >
         chr(149)         => ' -',
         chr(150)         => ' -',
         chr(133)         => 'a',
         chr(205)         => 'a',
         '\037'            => ' -',
         '\n'            => ' ',
         '\r'            => ' '
      );
      $text = strtr($text, $trans); 
      $text = preg_replace('/([0-9])([A-Z][a-z])/', '$1 $2', $text);
      //return $text;
      return mysql_real_escape_string(utf8_encode($text)); 
   }