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Editorial Team
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Asked: 2026-06-10T18:51:30+00:00

I am trying to pass a value from javascript to php using POST method

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I am trying to pass a value from javascript to php using POST method but it is not working .Here is the code:

<head>
<script type="text/javascript">
function Email()
{

    var e=prompt("Your Email","");
    if(e==null||e=="")
    {
    alert("You need to enter an email..Try again");
    Email();
    }

    return e;
}
function Code()
{

    var f=prompt("Activation code","");
    if(f==null||f=="")
    {
    alert("You need to enter the code..Try again");
    Code();
    }

    return f;
}
</script>
</head>
<body>
<form method="post">
<input type="hidden" id="Email" name="Email" />
<input type="hidden" id="Code" name="Code" />
</form> 
<script>
var email=Email();
var code=Code();
document.getElementByID("Email").value=email;
document.getElementByID("Code").value=code;
</script>

<?php
$email=$_POST["Email"];
$code=$_POST["Code"];

echo $email.$code;
?>
</body>

I get these errors :

  • Notice: Undefined index: Email
  • Notice: Undefined index: Code

Anybody please help me out…

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1 Answer

  1. Editorial Team

    Okey if you want to print those values you need to create a form form them, a proper one. If you just want to submit form no need for JS there because if you just want to submit some values there is no need for form, you want to use jQuery Post for that.

    <form method="post" action="">
    <label for="email">Email</label>
    <input type="text" name="email" />

    <label for="code">Code</label>
    <input type="text" name="code" />

    <input type="submit" value="Submit" />
</form>​

    Fiddle: here

    Edit

    Then this is what you want. (Note that this code is using jQuery library)

    $(function(){
    // Create both variables
    var code, email;

    // Ask for code and check if it's not null or empty
    do{
        code = prompt('Activation code', null);
    }
    while(code == null || code == '');


    // Ask for email and check if it's not null or empty
    do{
        email = prompt('Your email', null);
    }
    while(email == null || email == '');

    // Make POST request via AJAX to your script
    $.post('yourscript.php', { code: code, email: email }, function(data) {
        // If success alert response (in your case should be "email.data" values)
        alert(data);
    });   
});
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