Form Validation — CodeIgniter 3.1.11 documentation

Form Validation¶ CodeIgniter provides a comprehensive form validation and data prepping class that helps minimize the amount of code you’ll write. Overview¶ Before explaining CodeIgniter’s approach to data validation, let’s describe the ideal scenario: A form is displayed. You fill it in and submit it. If you submitted something invalid, or perhaps missed a required item, the form is redisplayed c