Validating email field
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: All of the native error messages are located in the following language file: system/language/english/form_validation_To set your own global custom message for a rule, you can either extend/override the language file by creating your own in application/language/english/form_validation_(read more about this in the Where rule corresponds to the name of a particular rule, and Error Message is the text you would like displayed.
If you’d like to include a field’s “human” name, or the optional parameter some rules allow for (such as max_length), you can add the and tags to your message, respectively: A nice feature of the Form Validation class is that it permits you to store all your validation rules for your entire application in a config file. These groups can either be loaded automatically when a matching controller/method is called, or you can manually call each set as needed.
To invoke a callback just put the method name in a rule, with “callback_” as the rule prefix.
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: Note You can also process the form data that is passed to your callback and return it.
We’ve arbitrarily called these two rules “signup” and “email”.
You can name your rules anything you want: An alternate (and more automatic) method of calling a rule group is to name it according to the controller class/method you intend to use it with.
To set validation rules you will use the Before moving on it should be noted that the rule setting method can be passed an array if you prefer to set all your rules in one action.
For example, let’s say you have a controller named Member and a method named signup.
The following example shows how you perform custom validation of the product field quantity input.
When you create a form, each field initially displays the value of the corresponding property of the form's domain data (e.g. If you want to override this initial value for the form or an individual field, you can set it in the data option: overrides the value taken from the domain data (object) when rendering.
This means the object value is also overriden when the form edits an already persisted object, causing it to lose its persisted value when the form is submitted. It does not set an initial value if none is provided when the form is rendered in a view.