Saving form values to another PHP page

Question

I have this piece of Javascript:

<script type="text/javascript" src="sha512.js"></script>
<script type="text/javascript" src="forms.js"></script>

<script>
            function loadXMLDoc(form, password) 
            {
            var xmlhttp;
            if (window.XMLHttpRequest)
              {// code for IE7+, Firefox, Chrome, Opera, Safari
              xmlhttp=new XMLHttpRequest();
              }
            else
              {// code for IE6, IE5
              xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
              }
            xmlhttp.onreadystatechange=function()
              {
              if (xmlhttp.readyState==4 && xmlhttp.status==200)
               {
                   document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
                   formhash(form, password);
               }
              }
            xmlhttp.open("POST","post.php",true);
            xmlhttp.send();
            }
</script>

And some HTML:

<div id="myDiv">
    <form action="register.php" method="post">
       Email: <input type="text" name="email" /><br />
       Username: <input type="text" name="username" /><br />
       Password: <input type="password" name="p" id="password" /><br />
       <input type="button" value="Register" onclick="loadXMLDoc(this.form, this.form.password);" />
    </form>
</div>

The Javascript code above has the job to run some Ajax with PHP and after that, run a encryption function (formhash). When the Ajax is run, it reads a page named "post.php" the post.php's job is to check if any of the fields are empty, before the password is encrypted.

My problem is that post.php can't remember that there is any values from the Register form which I posted above. post.php has to remember what the user typed in the fields, in order to see if they are empty or not. Any ideas on, how I can transfer those values to the post.php file?

xmlhttp.send(string); If you are using POST Method you should manually generated query string passed as a string in send() function. e.g. var post_query_string = "[email protected]&name=abc&p=myp"; xmlhttp.send(post_query_string); — Ashwin Parmar
– Ashwin Parmar, Commented Sep 30, 2013 at 9:41

leonardeveloper · Accepted Answer · 2013-09-30 09:47:20Z

1

You can try:

   parameters= 'username='+ form.elements[0].value +'&' +'password=' +form.elements[1].value ;
   xmlhttp.open("POST","post.php",true);
   xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
   xmlhttp.send(parameters);

edited Sep 30, 2013 at 9:47

answered Sep 30, 2013 at 9:38

leonardeveloper

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3 Comments

owwyess Over a year ago

This looks simple enough, will it then transfer the parameters to the post.php document? I will have to try this a bit later

Stefan Over a year ago

You are going to get into trouble with the stack police for supplying a w3schools resource - whether this specific info is accurate or not.

owwyess Over a year ago

This worked well, I just had to change the password parameter to 2, as the form starts with email(0), username(1) and then password(2).

Rajesh · Accepted Answer · 2013-09-30 09:30:57Z

1

looks like you are not submitting any data to server in the below line:

            xmlhttp.open("POST","post.php",true);

You can try below code to send data:

xmlhttp.open("POST","post.php",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("[email protected]&username=Ford&p=pass123");

answered Sep 30, 2013 at 9:30

Rajesh

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2 Comments

owwyess Over a year ago

Ah awesome, what is the email thing about?

Rajesh Over a year ago

i just passed all form elements. I think you need only the password.

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