How can PHP developers ensure that form submission is properly validated before executing the PHP code?

To ensure that form submission is properly validated before executing PHP code, developers can use server-side validation techniques such as checking for required fields, validating input data types, and implementing security measures to prevent injection attacks. This can help prevent malicious or incorrect data from being processed by the PHP code.

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate form inputs
    $name = $_POST['name'];
    $email = $_POST['email'];
    
    if (empty($name) || empty($email)) {
        echo "Please fill out all required fields";
    } else {
        // Process form data
        // Add code here to execute PHP logic
    }
}