update 1

connection.php

@@ -26,7 +26,8 @@ private function __clone() {}
     public static function getInstance() {
       if (!isset(self::$instance)) {
         $pdo_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_EXCEPTION;
-        self::$instance = new PDO('mysql:host=localhost;dbname=post', 'post', 'post', $pdo_options);
+       // self::$instance = new PDO('mysql:host=localhost;dbname=post', 'post', 'post', $pdo_options);
+            self::$instance = new PDO('mysql:host=localhost;dbname=post', 'root', '', $pdo_options);
       }
       return self::$instance;
     }

controllers/posts_controller.php

@@ -27,5 +27,61 @@ public function show() {
       $post = Post::find($_GET['id']);
       require_once('views/posts/show.php');
     }
+    public function add()
+    {
+
+      require_once('views/posts/add.php'); 
+    }
+    public function doadd()
+    {  
+      if(isset($_POST['add']))
+        {
+          $first_name = $_POST['firstname'];
+          $last_name = $_POST['lastname'];
+          $author = $_POST['author'];
+          $content = $_POST['content'];
+        }
+      $arr = array(
+        'first_name' =>$first_name,
+        'last_name' =>$last_name,
+        'author' => $author,
+        'content' => $content);   
+      $addPost = Post::add($arr);
+    }
+
+    public function delete() 
+    {
+      if(!isset($_GET['id']))
+        return call('pages','error');
+      $del = Post::del($_GET['id']);
+    }
+
+    public function edit()
+    {
+      if (!isset($_GET['id']))
+        return call('pages', 'error');
+      $posts = Post::find($_GET['id']);
+      require_once('views/posts/edit.php');
+    }
+
+    public function doedit()
+    {
+      if(isset($_POST['edit']))
+        {
+          $id = $_POST['id'];
+          $first_name = $_POST['firstname'];
+          $last_name = $_POST['lastname'];
+          $author = $_POST['author'];
+          $content = $_POST['content'];
+        }
+      $arr = array(
+        'first_name' =>$first_name,
+        'last_name' =>$last_name,
+        'author' => $author,
+        'content' => $content);   
+      $editPost = Post::edit($arr,$id);
+
+    }
+
   }
 ?>

fasf.txt

@@ -0,0 +1 @@
+fdfdsgsdfg

models/post.php

@@ -51,7 +51,41 @@ public static function find($id) {
       $req->execute(array('id' => $id));
       $post = $req->fetch();
 
-      return new Post($post['id'], $post['author'], $post['content']);
+      return $post;
+    }
+
+    public static function add($arr) {
+        $time = date('Y-m-d h:sa:i');
+        $db = Db::getInstance();
+        $req = "INSERT INTO `posts` (`id`, `first_name`, `last_name`, `author`, `content`, `created`, `modified`) VALUES (NULL, '".$_POST['firstname']."', '".$_POST['lastname']."', '".$_POST['author']."', '".$_POST['content']."', '".$time."', '".$time."')";
+        $query = $db -> query($req);
+        if($query) {
+          echo "Add success!";
+        }
+    }
+
+    public static function del($id) {
+      $db = Db::getInstance();
+      $id = intval($id);
+      $req = "DELETE FROM `posts` WHERE `id` = '".$id."'";
+      $query = $db->query($req);
+      if($query) {
+        echo "Del success!";
+      }
+    }
+
+    public static function edit($arr,$id) {
+        $time = date('Y-m-d h:sa:i');
+        $db = Db::getInstance();
+        $id = intval($id);
+        $req = "UPDATE `posts` SET `first_name` = '".$_POST['firstname']."', `last_name` = '".$_POST['lastname']."', `author` = '".$_POST['author']."', `content` = '".$_POST['content']."', `created` = '".$time."', `modified` = '".$time."' WHERE `posts`.`id` = ".$id."";
+        $query = $db -> query($req);
+        if($query) {
+          echo "edit success!";
+        }
+        else
+          echo "error";
     }
   }
-?>
+
+?>    

routes.php

@@ -18,7 +18,7 @@ function call($controller, $action) {
 
   // we're adding an entry for the new controller and its actions
   $controllers = array('pages' => ['home', 'error'],
-                       'posts' => ['index', 'show']);
+                       'posts' => ['index', 'show', 'add', 'doadd', 'delete','edit','doedit']);
 
 /** @var string $controller */
 if (array_key_exists($controller, $controllers)) {

views/layout.php

@@ -4,8 +4,9 @@
   </head>
   <body>
     <header>
-      <a href='/php_mvc'>Home</a>
+      <a href='?controller=pages&action=home'>Home</a>
       <a href='?controller=posts&action=index'>Posts</a>
+      <a href='?controller=posts&action=add'>add</a>
     </header>
 
     <?php require_once('routes.php'); ?>

views/posts/add.php

@@ -0,0 +1,7 @@
+<form action="?controller=posts&action=doadd" method="post" >
+	firstname: <input type="text" name="firstname">
+	lastname: <input type="text" name="lastname" >
+	author: <input type="text" name="author">
+	content: <input type="text" name="content">
+	<input type="submit" name="add" value="add">
+</form>

views/posts/edit.php

@@ -0,0 +1,8 @@
+<form action="?controller=posts&action=doedit" method="post" >
+	<input type="hidden" name="id" value="<?php echo $posts['id'] ?>">
+	<p> firstname: <input type="text" name="firstname" value="<?php echo $posts['first_name'] ?>"></p>
+	<p> lastname:   <input type="text" name="lastname" value="<?php echo $posts['last_name'] ?>" ></p>
+	<p> author:       <input type="text" name="author" value="<?php echo $posts['author'] ?>"> </p>
+	<p> content:     <input type="text" name="content" value="<?php echo $posts['content'] ?>"></p>
+	<p> <input type="submit" name="edit" value="edit"> </p>
+</form>

views/posts/index.php

@@ -4,5 +4,7 @@
   <p>
     <?php echo $post->author; ?>
     <a href='?controller=posts&action=show&id=<?php echo $post->id; ?>'>See content</a>
+    <a href='?controller=posts&action=delete&id=<?php echo $post->id; ?>'>Delete</a>
+    <a href='?controller=posts&action=edit&id=<?php echo $post->id; ?>'>Edit</a>
   </p>
 <?php } ?>

views/posts/show.php

@@ -1,4 +1,4 @@
 <p>This is the requested post:</p>
 
 <p><?php echo $post->author; ?></p>
-<p><?php echo $post->content; ?></p>
+<p><?php echo $post->content; ?></p>