What potential errors or issues may arise when using a WYSIWYG editor with PHP?

One potential issue that may arise when using a WYSIWYG editor with PHP is the injection of malicious code through user input. To prevent this, you should always sanitize and validate user input before saving it to the database. This can be done by using functions like htmlspecialchars() to encode special characters and prevent XSS attacks.

// Sanitize user input before saving to the database
$user_input = $_POST['user_input'];
$sanitized_input = htmlspecialchars($user_input);

// Save the sanitized input to the database
// Your database query here