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+--- Thread: Form validation by my own method (/thread-61557.html)
Form validation by my own method - Valery - 04-25-2015
Hello all!
I have a very simple task, but I can't make this :-( I have to check login and password in the database. So I have simple web form with two fields: login and password. I have a controller with rules:
PHP Code:
$rules = array(
array(
"field" => "login",
"label" => "Username",
"rules" => array("trim", "required", array("is_accessable", array($this->users, "get_access"))),
),
array(
"field" => "password",
"label" => "Password",
"rules" => "trim|required",
),
);
$this->form_validation->set_message("is_accessable", "Wrong login and password.");
And I have the model Users with the method get_access. But this method takes two parameters (login, password).
The question is, how can I pass second parameter to method get_access()?
Thank you very much in advance!
P.S.: Sorry for my English.
RE: Form validation by my own method - lexxtoronto - 04-26-2015
For example my controller calls a method in login_model like this: $usr_result=$this->login_model->get_user($username,$password); So in your case this would be: $this->users->get_access($username, $password);
RE: Form validation by my own method - RogerMore - 04-27-2015
Hey Valery,
If your using form validation, you can use your own function as a callback function to do the necessary checks. You would have to change a couple of things, because a validation function can only pass through the form input which is checked.
You could set it up like this (taken from the user guide with some changes):
PHP Code:
public function index()
{
$this->load->helper(array('form', 'url'));
$this->load->library('form_validation');
$this->form_validation->set_rules('username', 'Username', 'callback_username_check');
$this->form_validation->set_rules('password', 'Password', 'required');
$this->form_validation->set_rules('passconf', 'Password Confirmation', 'required');
$this->form_validation->set_rules('email', 'Email', 'required|is_unique[users.email]');
if ($this->form_validation->run() == FALSE)
{
$this->load->view('myform');
}
else
{
$this->load->view('formsuccess');
}
}
public function username_check($username)
{
$password = $this->input->post("password");
$this->load->model("users");
// use a model function to check the credentials
return $this->users->check_user_pass($username, $password);
// notice: get_access has to return true for success or false when user and/or password are wrong, because you have to tell form validation if your validation checks out or not.
}
And here you have a username/password validation workaround for 2 variables.
Happy coding!
RE: Form validation by my own method - Valery - 04-28-2015
Hello, RogerMore!
Thank you for aswer. But callback function doesn't suit me - I'd like to use this function not only in this controller. But this form ($this->input->post("password")) is what I was looking for. Thank you!
If you don't mind, I have one more question. If I am using callback function, I have to declare it such:
PHP Code:
public function my_callback_function($str)
{
...
}
How can I hide such functions? I've tried "protected" and "private", but it doesn't work.
Thank you.
RE: Form validation by my own method - Valery - 04-28-2015
Hello, lexxtoronto!
Thank you for your answer! But how can I use method wich takes two parameters in the array with rules?
"rules" => array("trim", "required", array("is_accessable", array($this->users, "get_access"))),
If I don't pass any parameters it means that this function takes only one parameter "login.value". Isn't? How can I pass second parameter in this $rules array?
RE: Form validation by my own method - mwhitney - 04-28-2015
(04-28-2015, 04:12 AM)Valery Wrote: Hello, RogerMore!
Thank you for aswer. But callback function doesn't suit me - I'd like to use this function not only in this controller. But this form ($this->input->post("password")) is what I was looking for. Thank you!
If you don't mind, I have one more question. If I am using callback function, I have to declare it such:
And there is an opportunity to call this function via URL, for example: http://www.mysite.com/my_controller/my_callback_function/aaaPHP Code:public function my_callback_function($str)
{
...
}
How can I hide such functions? I've tried "protected" and "private", but it doesn't work.
Thank you.
If you create a public function with an underscore as the first character of the function name, CI won't route that function to a URL, but it will still be visible to the form_validation class. So, you would define the method like this:
Code:
public function _my_callback_function($str)Then you would set your validation rule as:
Code:
callback__my_callback_function(Note the double underscore after the first instance of the word 'callback'.)
RE: Form validation by my own method - lexxtoronto - 04-28-2015
@Valery, Not sure how to pass 2 parameters. But if your users->get_access($usr,$pwd) takes two parameters and you don't supply any parameters or supply just one then get_access($usr,$pwd) will not be called. For example this is how I check if the username registered already:
Code:
$username = $this->input->post("txt_username");
$password = $this->input->post("txt_password");
$this->form_validation->set_rules('txt_username', 'Username', 'trim|required|min_length[5]|max_length[18]|is_unique[users.username]|xss_clean');It will query users table and see if there is $username. So maybe you could add something like this?
Code:
$this->form_validation->set_rules('txt_password', 'Password', 'is_unique[users.password]');Of course you have to hash it first.
RE: Form validation by my own method - CroNiX - 04-28-2015
You can always extend the Form_validation library and add your custom rules which would be accessible anywhere the form_validation library is used.
http://www.codeigniter.com/user_guide/general/creating_libraries.html#extending-native-libraries
/application/libraries/MY_Form_validation.php
PHP Code:
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class MY_Form_validation extends CI_Form_validation {
function __construct()
{
parent::__construct();
}
//a new custom rule
public function custom_rule($input)
{
//$input is the user input for this form field
if ($input == "hello")
{
return TRUE; //passed validation
} else {
//Failed! Set error message (using name of rule)
$this->set_message('custom_rule', 'The %s field can ONLY be "hello".');
}
//If we made it this far, we failed. Send FALSE back
return FALSE;
}
}
Then in your controller(s):
PHP Code:
$this->form_validation->set_rules('fieldname', 'field text', 'trim|custom_rule');
You can also create rules that receive extra parameters, which are passed in between the [] when setting the rule, like "min[5]". Anything in [] will automatically be passed to your rule definition as a 2nd parameter
PHP Code:
function some_rule($input, $extra = '')
{
}
if you used:
PHP Code:
$this->form_validation->set_rules('fieldname', 'field text', 'trim|some_rule[something here]');
If you look at how they are creating the native rules in the /system/libraries/Form_validation.php, it could be helpful when creating your custom rules.
RE: Form validation by my own method - Valery - 04-29-2015
@lexxtoronto , @CroNiX , @mwhitney , @RogerMore
THANK YOU VERY MUCH!