Get URL parameters inside custom module - php

Question

I've created a custom block like this:
class HelloBlock extends BlockBase implements BlockPluginInterface{
/**
* {#inheritdoc}
*/
public function build() {
$config = $this->getConfiguration();
$result = db_query('SELECT * FROM {test}');
return array(
'#theme' => 'world',
'#test' => $result
);
}
}
And I now want to programmatically get some parameter from the URL.
For example:
If the URL is http://localhost/drup/hello/5569 I want to get hold of the value 5569 inside my module.
I have tried arg(1) and drupal_get_query_parameters() but I got this error messages:
Call to undefined function `Drupal\hello\Plugin\Block\arg()`
and
Call to undefined function `Drupal\hello\Plugin\Block\drupal_get_query_parameters()`
How can I get the parameters?

Answer 1

Use \Drupal\Core\Routing;:
$parameters = \Drupal::routeMatch()->getParameters();
The named parameters are available as
$value = \Drupal::routeMatch()->getParameter('slug_name_from_route');
Where 'slug_name_from_router' comes from your routing.yml path property
path: '/your/path/{slug_name_from_route}'
If you want the raw parameter without any upcasting you can get
$value = \Drupal::routeMatch()->getRawParameter('slug_name_from_route');

Answer 2

I used to get the parameter value from URL (localhost/check/myform?mob=89886665)
$param = \Drupal::request()->query->all();
And applied in my select Query
$query = \Drupal::database()->select('profile_register', 'p1');
$query->fields('p1');
$query->condition('p1.mobileno', $edituseprof);
$query->condition('publishstatus', 'no');
$result = $query->execute()->fetchAll();
But on multiple parameter value, i am now successful(Ex: http://10.163.14.41/multisite/check/myform?mob=89886665&id=1)
$query = \Drupal::database()->select('profile_register', 'p1');
$query->fields('p1');
$query->condition('p1.mobileno', $edituseprof['mob']);
$query->condition('p1.ids', $edituseprof['id']);
$query->condition('publishstatus', 'no');
$result = $query->execute()->fetchAll();

Answer 3

arg() is deprecated in drupal 8, however we can get values like arg() function does in drupal 7 & 6
$path = \Drupal::request()->getpathInfo();
$arg = explode('/',$path);
print_r($arg); exit();
The output would be parameters in url except basepath or (baseurl),
Array
(
[0] =>
[1] => node
[2] => add
)

Answer 4

To get query parameter form the url, you can us the following.
If you have the url for example,
domainname.com/page?uid=123&num=452
To get "uid" from the url, use..
$uid = \Drupal::request()->query->get('uid');
To get "num" from the url, use..
$num = \Drupal::request()->query->get('num');

Answer 5

$route_match = \Drupal::service('current_route_match');
$abc = $route_match->getParameter('node'); //node is refrence to what you have written in you routing file i.e:
in something.routing.yml
entity.node.somepath:
path: '/some/{node}/path'
I have used {node} as arg(1). And I can access it by using *->getParameter('node');
Hope this will work.

Answer 6

If your url is like this below example
http://localhost/drupal/node/6666
Then you have to get the full url path by
$current_path = \Drupal::request()->getPathInfo();
then explode the path to get the arguments array.
$path_args = explode('/', $current_path);
Another example if value passed by a key in url like below where id contains the value
http://localhost/drupal?id=123
You can get the id by given drupal request
$id = \Drupal::request()->query->get('id');

Answer 7

Here's the example of accessing URL parameters and passing them to a TWIG template,
I am considering you have already created your module and required files and suppose "/test?fn=admin" is your URL
In Your .module file implement hook_theme and define variables and template name (Make sure you replace "_" with "-" when creating the template file)
function my_module_theme () {
return [
'your_template_name' => [
'variables' => [
'first_name' => NULL,
],
];
}
Now create your controller and put below code in it.
namespace Drupal\my_module\Controller;
use Drupal\Core\Controller\ControllerBase;
use Symfony\Component\HttpFoundation\Request;
class MyModule extends ControllerBase {
public function content(Request $request) {
return [
'#theme' => 'my_template',
'#first_name' => $request->query->get('fn'), //This is because the parameters are in $_GET, if you are accessing from $_POST then use "request" instead "query"
];
}
}
Now in your TWIG file which should be "my-template.html.twig" you can access this parameter as,
<h3>First Name: {{ first_name }}</h3>
And its done.
Hope this helps.

Answer 8

The Drupal docs are great on this: https://www.drupal.org/docs/8/api/routing-system/parameters-in-routes
define your path variable in yaml
example.name:
path: '/example/{name}'
...
Add the variable in your method and use it
<?php
class ExampleController {
// ...
public function content($name) {
// Name is a string value.
// Do something with $name.
}
}
?>