What are common mistakes when mixing PHP and HTML code in a form evaluation process?

One common mistake when mixing PHP and HTML code in a form evaluation process is not properly escaping user input, which can lead to security vulnerabilities such as cross-site scripting attacks. To solve this issue, always use functions like htmlspecialchars() to sanitize user input before displaying it back to the user. 

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $name = htmlspecialchars($_POST['name']);
    $email = htmlspecialchars($_POST['email']);
    
    // Process the form data
}
?>

Keywords

PHP HTML form evaluation validation syntax errors

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