Laravel 路由解析和顺序有关吗？

Route::get('/posts','\App\Http\Controllers\PostController@index');
Route::get('/posts/create','\App\Http\Controllers\PostController@create');
Route::post('/posts','\App\Http\Controllers\PostController@store');
Route::get('/posts/{post}','\App\Http\Controllers\PostController@show');
Route::get('/post/{post}/edit','\App\Http\Controllers\PostController@edit');
Route::put('/posts/{post}','\App\Http\Controllers\PostController@update');
Route::get('/posts/delete','\App\Http\Controllers\PostController@delete');

以上是正确的路由 但是为什么在我把第四行的路由换到第二行 也就是

Route::get('/posts','\App\Http\Controllers\PostController@index');
Route::get('/posts/{post}','\App\Http\Controllers\PostController@show');
Route::get('/posts/create','\App\Http\Controllers\PostController@create');
Route::post('/posts','\App\Http\Controllers\PostController@store');

Route::get('/post/{post}/edit','\App\Http\Controllers\PostController@edit');
Route::put('/posts/{post}','\App\Http\Controllers\PostController@update');
Route::get('/posts/delete','\App\Http\Controllers\PostController@delete');

这样之后，通往正确路由的就不对了 create解析到了show，show解析到了index,以下是控制器代码

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class PostController extends Controller
{
    //列表
    public function index()
    {
        echo 2;exit;
        return view('post/index');
    }

    public function show()
    {
        echo 1;exit;
        return view('post/show');
    }

    public function create()
    {

        return view('post/create');
    }

    public function store()
    {

    }

    public function edit()
    {
        return view('post/edit');
    }

    public function update()
    {

    }

    public function delete()
    {

    }
}