Start Validating input php

Validating input php

Below are some examples: Note: By default, inline validators will not be applied if their associated attributes receive empty inputs or if they have already failed some validation rules.

This is because the same validator will run for each attribute (3 times in total) and we only need to run it once for the whole attribute set.

You may write the validation rule like the following: Some validations can only be done on the server-side, because only the server has the necessary information.

For example, to validate if a username is unique or not, it is necessary to check the user table on the server-side. It will trigger an AJAX request in the background to validate the input while keeping the same user experience as the regular client-side validation.

The method will return a boolean value indicating whether the validation succeeded or not.