Php 对象注入错误

我正在从事一个Laravel 5.4项目。我面临一个问题。我想更多地了解这个问题

下面的代码正在工作

PostController.php

<?php

namespace App\Http\Controllers;

use DB;
use View;
use App\Model\Book;
use App\Model\Chapter;
use App\Model\Post;

class PostController extends Controller
{
      public function index(Book $book,Chapter $chapter)
      {
            $books = Book::all();
            $posts = Post::get_post($book,$chapter);

            $data = array(
                'posts'     => $posts,
                'books'       => $books,
                'section_id'  => ''
            );

            return View::make('posts')->with($data);
      }
}  

<?php

namespace App\Http\Controllers;

use DB;
use View;
use App\Model\Book;
use App\Model\Chapter;
use App\Model\Post;

class PostController extends Controller
{
      public function index(Book $book,Chapter $chapter)
      {
            $books = Book::all();
            $posts = Post::get_post(Book $book,Chapter $chapter); //issue is in this line

            $data = array(
                'posts'     => $posts,
                'books'       => $books,
                'section_id'  => ''
            );

            return View::make('posts')->with($data);
      }
}

---

此行的问题：

$posts = Post::get_post(Book $book,Chapter $chapter); //issue is in this line

调用函数时，不会键入提示类型。您应该像这样运行函数：

$posts = Post::get_post($book, $chapter);

public static function get_post(Book $book,Chapter $chapter) 
{
  // do whatever you want here
}

是的，您可以这样声明get_post函数：

$posts = Post::get_post($book, $chapter);

public static function get_post(Book $book,Chapter $chapter) 
{
  // do whatever you want here
}

但是现在，当你打电话时，你不再使用
Book
或
Chapter
这一行的问题：

$posts = Post::get_post(Book $book,Chapter $chapter); //issue is in this line

调用函数时，不会键入提示类型。您应该像这样运行函数：

$posts = Post::get_post($book, $chapter);

public static function get_post(Book $book,Chapter $chapter) 
{
  // do whatever you want here
}

是的，您可以这样声明get_post函数：

$posts = Post::get_post($book, $chapter);

public static function get_post(Book $book,Chapter $chapter) 
{
  // do whatever you want here
}

但是现在当你打电话时，你不再在这个函数中使用
Book
或
Chapter
，
公共函数索引（Book$Book，Chapter$Chapter）（）了，你从那里得到$Book我从模型中得到了这个
$Book
。谢谢如果您调用的模型正确，那么无需再次通过..公共函数索引（Book$Book，Chapter$Chapter）（）在这个函数中，您从那里获取$Book我从模型获得这个
$Book
。谢谢，如果你打对了模特，那么就不用再打了。。