The username field be no shorter than 5 characters and no longer than Check for required data. Sanitize the data for security. You can see that the form field data was passed to your callback method for you to process. The one you will use most commonly is: Note You can also process the form data that is passed to your callback and return it. Important If you use an array as the name of a form field, you must supply it as an array to the function. This makes your application more portable in the event your URLs change. This method initializes the validation class and loads the form helper and URL helper used by your view files. Give it a try! If you submitted something invalid, or perhaps missed a required item, the form is redisplayed containing your data along with an error message describing the problem.
The password field must match the password confirmation field. Verify that the data is of the correct type, and meets the correct criteria. In order to get around that problem, you can put such rules as the second element of an array, with the first one being the rule name: Note The form fields are not yet being re-populated with the data when there is an error. It must be of a minimum length, and not exceed a maximum length. For example, if a username is submitted it must be validated to contain only permitted characters. This makes your application more portable in the event your URLs change. This permits you to extend the validation class to meet your needs. If there are no messages it returns an empty string. Important If you use an array as the name of a form field, you must supply it as an array to the function. You can see that the form field data was passed to your callback method for you to process. If you submitted something invalid, or perhaps missed a required item, the form is redisplayed containing your data along with an error message describing the problem. If not provided will use the default one. There are numerous rules available which you can read about in the validation reference. Based on whether the validation was successful it either presents the form or the success page. Give it a try! Although there is nothing terribly complex about the above process, it usually requires a significant amount of code, and to display error messages, various control structures are usually placed within the form HTML. Note If you would like the field name to be stored in a language file, please see Translating Field Names. A View file containing a form. Changing delimiters Globally To globally change the error delimiters, in your controller method, just after loading the Form Validation class, add this: If you need to receive an extra parameter in your callback method, just add it normally after the method name between square brackets, as in: It also runs the validation routine. Change your rules in the third parameter of rule setting method, like this: You fill it in and submit it. The email field must contain a valid email address.
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