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Since you haven’t told the Form Validation class to validate anything yet, it returns FALSE (boolean false) by default.``The run()`` method only returns TRUE if it has successfully applied your rules without any of them failing. This method initializes the validation class and loads the form helper and URL helper used by your view files. Based on whether the validation was successful it either presents the form or the success page.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.Form validation, while simple to create, is generally very messy and tedious to implement.Hi all, I am a newbie in PHP and is validating a form in PHP. The issue is that form validation is working properly to the field of email address.After this email comes the password and confirm password.
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.Any native PHP function that accepts one parameter can be used as a rule, like ``htmlspecialchars()``, ``trim()``, etc. It’s time to repopulate the form field with the submitted data.Code Igniter offers several helper functions that permit you to do this.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.As shown earlier, the validation array will have this prototype: In order to organize your rules into “sets” requires that you place them into “sub arrays”.Consider the following example, showing two sets of rules.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.For example, if you need to run a database query to see if the user is choosing a unique username, you can create a callback method that does that. In your controller, change the “username” rule to this: Reload your form and submit it with the word “test” as the username.You can see that the form field data was passed to your callback method for you to process.