Undefined Index in my PHP code.

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//Why is that I cant retrieve the value of UserID from my JavaScript code to PHP, it says that "Undefined index: userID"

//this is my Code

//JavaScript CODE

function Print(str) {
        var userID = str;
        $.ajax({
                    type: "POST",
                    url: 'ROOMS.php',
                    data: { userID : userID },
                    success: function(data)
                    {
                        alert("success!");
                    }
                });
    }


//PHP CODE

<?php

    $id = $_POST['userID'];
    echo $id;
?>

Posted 1-Sep-14 23:25pm

Mc Clinton Salamanes

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Comments

Kornfeld Eliyahu Peter 2-Sep-14 5:36am

Try this:
data: { 'userID' : userID },

[no name] 3-Sep-14 2:58am

still not working , but thnkx

1 solution

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Manikandan Subbu · Answer 1 · 2014-09-02T00:15:00

Solution 1

The variable name you are using in the javascript is same as that of the post variable name. So change any one of the variable name and try it.

JavaScript

function Print(str) {
        $.ajax({
                    type: "POST",
                    url: 'ROOMS.php',
                    data: { userID : str },
                    success: function(data)
                    {
                        alert("success!");
                    }
                });
    }

Posted 2-Sep-14 0:15am

Manikandan Subbu

Updated 2-Sep-14 0:16am

v2

Comments

[no name] 3-Sep-14 3:00am

i tried your codes but still not working . and I dont know why. . . but thanks for helping

Manikandan Subbu 3-Sep-14 3:06am

Can you put the error message here ?

[no name] 3-Sep-14 3:13am

Undefined error variable id

Manikandan Subbu 3-Sep-14 4:43am

Php takes a single quote string as a constant. so use double quotes to retrieve the value (like $_POST["userID"]).