What are the implications of using non-standard characters in form field names in PHP scripts?

Using non-standard characters in form field names in PHP scripts can lead to potential security vulnerabilities such as SQL injection attacks or cross-site scripting (XSS) attacks. To mitigate this risk, it is important to sanitize and validate user input before processing it in the PHP script. This can be done by using functions like htmlspecialchars() to encode special characters and prevent them from being interpreted as code.

// Sanitize and validate form field names in PHP script
$field_name = htmlspecialchars($_POST['field_name']);
// Use $field_name in your PHP script