Generating URLs in Laravel: Basic URLs, Current URL, Named Routes, and Parameter Passing

Laravel provides several helper functions for generating URLs, which are useful for building links in templates, API responses, or creating redirect responses.

1. Generate a basic URL

<?php
$post = App\Post::find(1);
// Parameter passing
echo url("/posts/{$post->id}");
// http://example.com/posts/1

2. Access the current URL

<?php
echo url();
echo url()->full();
echo url()->previous();

Alternatively, you can use the URL facade:

<?php
namespace App\Http\Controllers;
use Illuminate\Support\Facades\URL;
class HomeController extends Controller {
    echo URL::current();
}

3. Generate a named route URL

<?php
Route::get('/post/{post}', function () {})->name('post.show');

Access the named route:

<?php
echo route('post.show', ['post' => 1]);
// http://example.com/post/1

Passing a model instance as a parameter:

<?php
echo route('post.show', ['post' => $post]);

4. Generate a URL with multiple parameters

<?php
Route::get('/post/{post}/comment/{comment}', function () {})->name('comment.show');

Access the route with both parameters:

<?php
echo route('comment.show', ['post' => 1, 'comment' => 3]);
// http://example.com/post/1/comment/3

These URL generation techniques are simple and enable rapid learning of Laravel routing.