What potential issues can arise when using PHP for form processing?

One potential issue when using PHP for form processing is the lack of data validation, leading to security vulnerabilities such as SQL injection or cross-site scripting attacks. To solve this, always sanitize and validate user input before processing it. 

// Sanitize and validate user input
$name = htmlspecialchars($_POST['name']);
$email = filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);

// Process the form data
// Your form processing logic here

Keywords

SQL injection cross-site scripting form validation CSRF attacks file uploads

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