in my controller i have an public variable i want to use in my view.
public $header = array("show_menu"=>true);
Traditional i would pass variables as an array to the load->view("incl_header",$header) function, however i have noticed that in my view i can retrieve variables of my controller like so:
echo $this->header['show_menu'];
Are there any problems retrieving variables like this in my view file?
I am using codeigniter 2.1.3
It's possible to do it like that.
If you use var_dump($this) you can see all the variables that are availible in your view.
It's not the normal codeigniter way of retrieving variables in your view.
How ever this might change in futeure releases of codeigniter so you must keep that in mind when using this method.
Related
In Laravel controller function you can return view with array of variables you like to share with the current view. Something like this:
public function index() {
return view('index')->with(['name' => 'John doe']);
}
Then you can use the name inside the with() function as $name in your view.
Can someone explain how it been done please? I would like to do something similar by myself.
We can pass individual pieces of data to the view using the 'with' method.
When passing information in this manner, the data should be an array with key / value pairs. Inside your view, we can then access each value using its corresponding key, such as
<?php echo $key; ?>
Laravel include the view file inside a function which makes all defining variables scope within a function.
Just before including files laravel calls PHP's builtin function extract(array) which declare all the variable in the scope.
extract create variables out of array making key as variable name and value as variable value.
I do some calculations in the controller, and pass the data to my view like this.
return View::make('fend.clist', compact('detail_'));
From this view controller "fend.clist" I'd like to open another view (blade) along with the 'detail_' variable which basically has some data that I need to show there. I tried POSTing it, but I wasn't able to recieve the data completely.
How else can I pass data from one view to another view?
By using the sessions, first put:
Session::put(['name'=>'value']);
Then get:
Session::get('name');
You must nest sub-view to view and pass data to sub-view.
return View::make('fend.clist')->nest('fend.detail', compact('detail_'));
More info in docs
I have been trying to pass an array that is generated in view to controller.
Say, $abc=array(); How do I sent this array to controller, then process it and sent this array to another view?
Is it even feasible? Not getting any answer after googling! Please help.
I see no point to generate array from inside the view.
It depends how your framework passes the data between the layers.
For example the controller do pass the data to the View object.
I.e.
public function someMethodInController() {
$this->view->varName['arr_key'] = 'something';
}
But talking about view, it might not have a certain controller already instantiated (usually it's against the MVC paradigm)
So I see two major ways:
Instantiate a controller (I would not prefer this)
$controller = MyController();
$controller->abc = $abc;
Or use sessions. This way to transmit data is universal inbetween your domain, and does not care if you are using a certain pattern, or how do you transmit between layers.
$_SESSION['abc'] = $abc;
Once assigned, you can use it in the same session from each of your files.
I want my Codeigniter to call a function export(...) when
domain.com/foo/bar/show/122.export
also the same function if
domain.com/boo/for/show_all/172.export
domain.com/goo/par/detail/122.export
so I thought I could define that function export(...) only once
and pass the HTML code of the respective page to the export function,
or at least the source of the call.
How can I define this for my whole CI-page?
you can use CI's URI route
something like this should work (say your export function is in exports controller)
$route['([a-z]+)/([a-z]+)/([a-z]+)/(\d+)\.(export)'] = "exports/export/$1/$2/$3/$4";
So your export method will have source information.
I have just started learning Code Igniter .
I want to know how can I pass a variable from one controller(first_cont.php) to other controller (second_cont.php) ?
Any help would be appreciated .
Thanks in Advance :)
It will depend on the circumstances. If you want to retain the data for some time, then session data would be the way to go. However, if you only need to use it once, flash data might be more appropriate.
First step would be to initialise the session library:
$this->load->library('session');
Then store the information in flash data:
$this->session->set_flashdata('item', $myVar);
Finally, in the second controller, fetch the data:
$myVar = $this->session->flashdata('item');
Obviously this would mean you'd have to either initialise the session library again from the second controller, or create your own base controller that loads the session library and have both of your controllers inherit from that one.
I think in codeigniter you can't pass variable, between two different controller. One obvious mechanism is to use session data.
Ok, here is something about MVC most will readily quote:
A Controller is for taking input, a model is for your logic, and, a view is for displaying.
Now, strictly speaking you shouldn't want to send data from a controller to another. I can't think of any cases where that is required.
But, if it is absolutely needed, then you could simply use redirect to just redirect to the other controller.
Something like:
// some first_cont.php code here
redirect('/second_cont/valuereciever/value1')
// some second_cont.php code here
public function valureciever($value){
echo $value; // will output value1
}
In Codeigniter there are many way to pass the value from one controller to other.
You can use codeigniter Session to pass the data from one controller to another controller.
For that you have to first include the library for session
$this->load->library('session');
Then You can set the flash data value using variable name.
// Set flash data
$this->session->set_flashdata('variable_name', 'Value');
Them you can get the value where you want by using the codeigniter session flashdata
// Get flash data
$this->session->flashdata('variable_name');
Second Option codeigniter allow you to redirect the url from controll with controller name, method name and value and then you can get the value in another controller.
// Passing the value
redirect('/another_controller_name/method_name/variable');
Then you can get the value in another controller
public function method_name($variable)
{
echo $variable;
}
That all....
If you are using session in the first controller then dont unset that session in first controller, instead store the value which you want in the other controller like,
$sess_array = array('value_name1' => 'value1', 'value_name2' => 'value2');
$this->session->set_userdata('session_name', $sess_array);
then reload this session in the other controller as
$session_data= $this->session->userdata('session_name');
$any_var_name = $session_data['value1'];
$any_var_name = $session_data['value2'];
this is how you can pass values from one controller to another....
Stick to sessions where you can. But there's an alternative (for Codeigniter3) that I do not highly recommend. You can also pass the data through the url. You use the url helper and the url segment method in the receiving controller.
sending controller method
redirect("controller2/method/datastring", 'refresh');
receiving controller method
$this->load->helper('url');
$data = $this->uri->segment(3);
This should work for the default url structure. For a url: website.com/controller/method/data
To get controller $this->uri->segment(1)
To get method $this->uri->segment(2)
The limitation of this technique is you can only send strings that are allowed in the url so you cannot use special characters (eg. %#$)