I'm currently working on a project in PHP and I'm having some trouble handling errors related to form validation and user input. I have a form on my website that captures user information, and I want to ensure that all the fields are properly validated and display error messages for any incorrect or missing input.
I've already implemented basic client-side validation using HTML5 attributes like `required` and `pattern`, but I know that relying solely on client-side validation is not enough. I want to make sure that the server-side also validates the user input and provides appropriate error messages.
Can you please guide me on how to tackle this issue effectively? Are there any best practices or popular libraries in PHP that can assist with form validation and error handling? Any code examples or tips would be greatly appreciated.
Thanks in advance for your help!