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<?php
// Check if the form was submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
// Sanitize and retrieve form inputs
$last_name = htmlspecialchars(trim($_POST['last_name']));
$first_name = htmlspecialchars(trim($_POST['first_name']));
$age = isset($_POST['age']) ? (int)$_POST['age'] : null; // Optional, so we check if it's set
$gender = htmlspecialchars(trim($_POST['gender']));
// Check required fields
if (!empty($last_name) && !empty($first_name)) {
// Process form data (e.g., store in a database, display, etc.)
echo "<h1>Form Submitted Successfully!</h1>";
echo "<p>Last Name: " . $last_name . "</p>";
echo "<p>First Name: " . $first_name . "</p>";
echo "<p>Age: " . ($age !== null ? $age : 'Not provided') . "</p>";
echo "<p>Gender: " . $gender . "</p>";
} else {
// Handle missing required fields
echo "<p>Error: First name and last name are required.</p>";
}
} else {
echo "<p>No form was submitted.</p>";
}
?>