Route function meaning - php

Question

I am having some difficulty understanding what this code is doing. could someone explain it to me? I saw some people using it to redirect user to another page with it but I don't understand this part here "['id'=>$data3->id]) ".
Here is the full code: (from view page)
<a href="{!! route('user.upload.image', ['id'=>$data3->id]) !!}">
Controller (how data3 is being passed to view):
public function getInfo($id) {
$data3=UserImage::where('user_id',$id)->get();
return view('view',compact('data3'));
Route:
Route::get('/userUpload/{user}/create1','CreateController#create1')->name('user.upload.iamge');
Route::get('user/show/{id}','HomeController#getInfo')->name("user.show");
create1 controller:
public function create1(personal_info $user){
return view('create1')->withUser($user);
}

Answer 1

Based on your routes
Route::get('/userUpload/{user}/create1','CreateController#create1')->name('user.upload.iamge');
Route::get('user/show/{id}','HomeController#getInfo')->name("user.show");
The first route has a parameter user which must be passed to it anytime the route is called.
The second one also has an id parameter which must also be passed to it.
Passing the parameter values to the routes can be done in many ways. Eg.
By using the route name:
<a href="{!! route('user.upload.image', ['user'=>$data3->id]) !!}">
This method requires you to pass all the parameters as an array with the parameter name as the key of the array.
You can also call the route like:
<a href="/userUpload/{$data3->id}/create1">
Which requires nothing since the parameter has been hardcoded into the url.
Any time you accept parameters in your route, to pass them to your controller or route function, the must be listed on the order in which they are arranged.
So your getInfo passes the id parameter it received from the route to the controller
public function getInfo($id) {
$data3=UserImage::where('user_id',$id)->get();
return view('view',compact('data3'));
}