How can PHP code be structured to ensure proper data validation and display in HTML tables?
To ensure proper data validation and display in HTML tables, PHP code should validate input data before inserting it into the database and sanitize output data before displaying it on the web page. This can help prevent SQL injection attacks and cross-site scripting vulnerabilities. Additionally, using PHP functions like htmlentities() and htmlspecialchars() can help escape special characters and prevent malicious code from being executed.
// Validate input data
$name = isset($_POST['name']) ? $_POST['name'] : '';
$email = isset($_POST['email']) ? $_POST['email'] : '';
// Sanitize output data
echo '<table>';
echo '<tr><th>Name</th><th>Email</th></tr>';
echo '<tr><td>' . htmlentities($name) . '</td><td>' . htmlentities($email) . '</td></tr>';
echo '</table>';