codeigniter alternative to Get variables - codeigniter

Question

I was looking for a way to pass "GET" variables in codeigniter and ended up coming across this :
link text
I am wondering how to implement it.
For example :
www.website.com/query would give me every entry in the DB .
Typically I would have
www.website.com/query/?id=5 to get the equivalent entry.
when i try to do that the CI way :
www.website.com/query/id/5
I get a 404 error since it is looking for a class named id and it can't find it.
is there any way to get a step by step way to do this?
thank you.

Answer 1

Two good ways to achieve this using methods intended by the Codeigniter developers.
OPTION ONE:
If you always expect an "id" parameter to be present you could take advantage of a feature where you pass the value in the URI immediately after the method (function) you want to call.
Example passing /[controller]/[method]/[value]:
http://www.website.com/query/index/5
You would then access the value of "id" as an expected parameter of the function.
Class Query extends Controller {
...
// From your URL I assume you have an index method in the Query controller.
function index($id = NULL)
{
// Show current ID value.
echo "ID is $id";
...
}
...
}
OPTION TWO:
If you would like to allow many parameters to be passed in addition to ID, you could add all parameters as key=>value pairs to the URI segments in any order.
Example passing /[controller]/[method]/[key1]/[val1]/[key2]/[val2]/[key3]/[val3]:
http://www.website.com/query/index/id/5/sort/date/highlight/term
You would then parse all the URI segments from the 3rd segment ("id") forward into an array of key=>value pairs with the uri_to_assoc($segment) function from the URI Class.
Class Query extends Controller {
...
// From your code I assume you are calling an index method in the Query controller.
function index()
{
// Get parameters from URI.
// URI Class is initialized by the system automatically.
$data->params = $this->uri->uri_to_assoc(3);
...
}
...
}
This would give you easy access to all the parameters and they could be in any order in the URI, just like a traditional query string.
$data->params would now contain an array of your URI segments:
Array
(
[id] => 5
[sort] => date
[highlight] => term
)
HYBRID OF ONE AND TWO:
You could also do a hybrid of these where ID is passed as an expected parameter and the other options are passed as key=>value pairs. This is a good option when ID is required and the other parameters are all optional.
Example passing /[controller]/[method]/[id]/[key1]/[val1]/[key2]/[val2]:
http://www.website.com/query/index/5/sort/date/highlight/term
You would then parse all the URI segments from the 4th segment ("sort") forward into an array of key=>value pairs with the uri_to_assoc($segment) function from the URI Class.
Class Query extends Controller {
...
// From your code I assume you are calling an index method in the Query controller.
function index($id = NULL)
{
// Show current ID value.
echo "ID is $id";
// Get parameters from URI.
// URI Class is initialized by the system automatically.
$data->params = $this->uri->uri_to_assoc(4);
...
}
...
}
$id would contain your ID value and $data->params would contain an array of your URI segments:

Answer 2

You can still use GET parameters, they're just mapped to controller member function parameters:
test.com/query/id/4
Would map to the controller:
$query->id($id);
This assumes you have added a query controller and member function properly in the controllers folder in your CI application.
You can also pass your parameter values as POST parameters using a form and the CI input class.

Answer 3

Use $this->uri->uri_to_assoc(2) 2 is an offset, as you starting your associative array of segments in the 2nd segment. You will also need a route to make /query map to a controller and method (unless you do this in the index() method).
So, this URL:
/query/id/foo/key/bar
could be read using:
$get = $this->uri->uri_to_assoc(2);
echo $get['id']; // 'foo'
echo $get['key']; // 'bar'
It's not great, but it works.