How Can I Pass JavaScript Variables to PHP for Database Insertion?

Integrating JavaScript and PHP Variables

In web development, it can be desirable to pass JavaScript variables to PHP for further processing. However, this presents a challenge as PHP is executed server-side, while JavaScript runs client-side in the user's browser.

Consider the following code snippet:

<script type="text/javascript">
    function addTraining(leve, name, date) {
        var level_var = document.getElementById(leve);
        var training_name_var = document.getElementById(name);
        var training_date_var = document.getElementById(date);

        <?php
            $result = "INSERT INTO training(level, school_name, training_date) VALUES('level_var', 'training_name_var', 'training_date_var')";
        ?>
    }
</script>

When this function is triggered by a button click, it attempts to insert values from JavaScript variables into a database using PHP. However, this approach is flawed because:

• PHP is executed before the JavaScript code runs.
• The server no longer has access to PHP variables once JavaScript is executed on the client's machine.

Therefore, the PHP code within the JavaScript will not be executed.

To overcome this limitation, consider these alternatives:

• Redirect to a PHP Script: Redirect the page to a PHP script that expects these values and inserts them into the database.
• AJAX Call to a PHP Script: Use an AJAX call to send the values to a PHP script asynchronously, without reloading the page.

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