Is it a best practice to use JavaScript to control form submission behavior in PHP applications?

It is not a best practice to use JavaScript to control form submission behavior in PHP applications because it can lead to security vulnerabilities and unreliable data processing. It is recommended to handle form submission and validation on the server-side using PHP to ensure data integrity and security. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Process form data
    $name = $_POST["name"];
    $email = $_POST["email"];
    
    // Validate form data
    if (empty($name) || empty($email)) {
        echo "Please fill out all required fields.";
    } else {
        // Process form submission
        // Add your code here to handle form submission
    }
}
?>

Keywords

JavaScript form submission PHP applications control behavior best practice

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