How can JavaScript be integrated with PHP to prevent form submission without required input?

To prevent form submission without required input, JavaScript can be integrated with PHP by using client-side validation to check if the required fields are filled out before allowing the form to be submitted to the server. This can help improve user experience by providing instant feedback to users if they forget to fill out a required field. 

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

Keywords

JavaScript PHP form submission input validation integration

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