<?php
 function pdf2string ($sourceFile)
 {
  $textArray = array ();
  $objStart = 0;
 
  $fp = fopen ($sourceFile, 'rb');
  $content = fread ($fp, filesize ($sourceFile));
  fclose ($fp);
 
  $searchTagStart = chr(13).chr(10).'stream';
  $searchTagStartLenght = strlen ($searchTagStart);
 
  while ((($objStart = strpos ($content, $searchTagStart, $objStart)) && ($objEnd = strpos ($content, 'endstream', $objStart+1))))
  {
    $data = substr ($content, $objStart + $searchTagStartLenght + 2, $objEnd - ($objStart + $searchTagStartLenght) - 2);
    $data = @gzuncompress ($data);
   
    if ($data !== FALSE && strpos ($data, 'BT') !== FALSE && strpos ($data, 'ET') !== FALSE)
    {
      $textArray [] = ExtractText ($data);
    }
   
    $objStart = $objStart < $objEnd ? $objEnd : $objStart + 1;
  }
 
  return $textArray;
 }

 function ExtractText ($postScriptData)
 {
  while ((($textStart = strpos ($postScriptData, '(', $textStart)) && ($textEnd = strpos ($postScriptData, ')', $textStart + 1)) && substr ($postScriptData, $textEnd - 1) != '\\'))
  {
    $plainText .= substr ($postScriptData, $textStart + 1, $textEnd - $textStart - 1);
    if (substr ($postScriptData, $textEnd + 1, 1) == ']') //this adds quite some additional spaces between the words
    {
      $plainText .= ' ';
    }
   
    $textStart = $textStart < $textEnd ? $textEnd : $textStart + 1;
  }
 
  return stripslashes ($plainText);
 }
?>