What are some potential pitfalls to be aware of when implementing user input confirmation in PHP applications?

One potential pitfall when implementing user input confirmation in PHP applications is not properly sanitizing the input before displaying it back to the user, which can lead to security vulnerabilities such as cross-site scripting (XSS) attacks. To mitigate this risk, always use functions like htmlspecialchars() to escape user input before displaying it on the page. 

$user_input = $_POST['user_input'];
$escaped_input = htmlspecialchars($user_input, ENT_QUOTES, 'UTF-8');
echo "You entered: " . $escaped_input;

Keywords

SQL injection cross-site scripting input validation htmlentities prepared statements

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