Because your database contains sensitive information, hackers may attempt to use your form to submit malicious commands to your backend database.
Finally, notice that instead of using "text" as the input type for the email and url fields, we use "email" and "url".If any fields are not valid, the form will not be submitted and the user will be informed with error messages for the fields that are causing problems.To get started, we'll create an HTML page that include a form with the id "contact". It should contain an label, an input (or textarea), and a span that will contain the error message.The name can’t be empty and password can’t be less than 6 characters long. The user will not be forwarded to the next page until given values are correct. By validating form responses before accepting them, we can alert users to their errors before they submit the form.
For example, suppose your user submits the form without entering a mandatory field.