How to Pass a JavaScript Variable to PHP Using AJAX?

Passing Javascript Variable to PHP via AJAX

Passing data from Javascript to server-side PHP code is essential for interactive web development. One common method for achieving this is through AJAX. To effectively pass a Javascript variable to PHP, follow these steps:

1. Configure the AJAX Call:

Update the Javascript code to correctly format the data being sent to PHP:

<code class="javascript">$.ajax({
    type: "POST",
    url: 'logtime.php',
    data: { userID : userID },
    success: function(data)
    {
        alert("success!");
    }
});</code>

2. Retrieve the Data in PHP:

In your PHP script (logtime.php), access the data using the proper syntax:

<code class="php">if(isset($_POST['userID']))
{
    $uid = $_POST['userID'];

    // Perform actions using $uid
}</code>

3. Note on isset() Function:

The isset() function in PHP is used to check if a variable exists. In the updated PHP code, it ensures that the 'userID' variable is set in the POST request before assigning it to the $uid variable.

The above is the detailed content of How to Pass a JavaScript Variable to PHP Using AJAX?. For more information, please follow other related articles on the PHP Chinese website!