Фатальная ошибка: вызов функции-члена fetch_array() на не-объекте в C:\xampp\htdocs\personal\post.php на линии 36
Я новичок в PHP, и я хотел бы назвать массивы order by id.Но в верхней части страницы он показывает
Notice: Undefined index: id in C:\xampp\htdocs\personal\post.php on line 9
Что я уже пробовал:
<?php
include "libs/db.php";
include "libs/config.php";
include "function.php";
$db = new database();
$id = $_GET['id'];
$query = "SELECT * from posts WHERE id = '$id'";
$posts = $db->select($query);
?>
<!DOCTYPE html>
<html>
<title>W3.CSS Template</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Raleway">
<link href="vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<style>
body,h1,h2,h3,h4,h5 {font-family: "Raleway", sans-serif}
</style>
<body class="w3-light-grey">
<!-- w3-content defines a container for fixed size centered content,
and is wrapped around the whole page content, except for the footer in this example -->
<div class="w3-content" style="max-width:1400px">
<!-- Header -->
<header class="w3-container w3-center w3-padding-32">
<a href="index.php?container.php"><h1>MY BLOG</h1></a>
<p>Welcome to the blog of <span class="w3-tag">Programmer</span></p>
</header>
<?php $row = $posts->fetch_array() ;?>
<!-- Grid -->
<div class="w3-row">
<!-- Blog entries -->
<div class="w3-col l8 s12">
<!-- Blog entry -->
<div class="w3-card-4 w3-margin w3-white">
<img src="images/<?php echo $row['image'];?>" alt="Nature" style="width:100%">
<div class="w3-container">
<h3><?php echo $row['title'];?></h3>
<h5>Posted by Sulaymonov on <span class="w3-opacity"><?php echo formatDate($row['date']);?></span></h5>
</div>
<div class="w3-container">
<p><?php echo $row ['content'];?></p>
<div class="w3-row">
<div class="w3-col m8 s12">
</div>
<div class="w3-col m4 w3-hide-small">
<p><span class="w3-padding-large w3-right">Comments <span class="w3-tag">0</span></span></p>
</div>
</div>
</div>
</div>
<hr>
<!-- END BLOG ENTRIES -->
</div>