i'm trying to send a string from javascript to php where the string will be written to a text file.
here's the relevant parts of the javascript:

Code:
<html>

 <script type=""text/javascript"">
  // Javascript
    
  function getRequest() {
   var req = false;
   try{
    // most browsers
    req = new XMLHttpRequest();
   } catch (e){
    // IE
    try{
     req = new ActiveXObject("Msxml2.XMLHTTP");
    } catch (e) {
     // try an older version
     try{
      req = new ActiveXObject("Microsoft.XMLHTTP");
     } catch (e){
      return false;
     }
    }
   }
   return req;
  }

  function sendWords( wordsString ) {
   var ajax = getRequest();
   ajax.onreadystatechange = function(){
    if(ajax.readyState == 4){
     alert(ajax.responseText);
    }
   }
   document.getelementbyid('frmOne').action="saveWords.php"; 
   
   var jsonText = JSON.stringify(wordsString);
   ajax.open("GET", "saveWords.php", true);
   ajax.send("wordsString="+jsonText);
   
  }
  
  function getWords() {
   var ajax = getRequest();
   ajax.onreadystatechange = function(){
    if(ajax.readyState == 4){
     words = ajax.responseText;
    }
   }
   ajax.open("GET", "readWords.php", true);
   ajax.send(null);
 }

 </script>
 
 <?php

 ?>
<FORM NAME="frmOne" id="frmOne" Method = "GET" Action = "">
</html>
at the moment, i'm still stuck trying to get the sendWords function working.
this is saveWords.php:

PHP Code:
<?php
 if(isset($_GET["wordsString"])) {
  $jsonVal=json_decode($_GET["wordsString"]);
  file_put_contents("filename.txt", $contents);
 }
?>
when I can save the string variable, I also need to be able to read the file contents in php + retrieve the string in the getWords function.

this is readWords.php:

PHP Code:
<?php
 $file_handle=fopen("filename.txt", "r");
 $returnString=fgets($file_handle);
 fclose($file_handle);
 return $returnString;
?>
can anyone help with this? thanks.