我创建了一个profile.php页面，但在登录到我的用户配置文件后，我想显示用户信息。我得到以下错误。
错误消息致命错误：在第16行对/home/a6150953/public_html/profile.php中的非对象调用成员函数Fetch（）`任何人都可以帮我找到解决方案。
profile.php
<?php
session_start();
//session_destroy();
include_once('php/classes/class.user.php');
$user1 = new User($con);
if(isset($_POST['logout'])) {
session_destroy();
header('Location: index.php');
}
include_once('php/common/head.php');
$all = $con->Fetch("select * from users");
?>
<div class="wrapper">
<h1>
<?php
if(isset($_SESSION['uid'])){
echo "Profile Page for ". $all[0]['fullname'] ." ";
}else{
echo "Welcome", "<br/><a href='index.php'>Login</a>";
}
?>
</h1>
<pre>
<div id="profile">
<?php
if(isset($_GET['uid']) || isset($_SESSION['uid'])) {
if($_GET['uid'] == $_SESSION['uid']) {
echo " " . $all[0]['fullname'] . " ";
echo "<form action='' method='post'>
<input type='hidden' name='logout' value='true' />
<input type='submit' name='submit' value='Logout'>
</form>";
}else if($user1->check_user($uid)){
echo '<p>'.$all[0]['fullname'].'</p>';
echo '<p>'.$all[0]['uemail'].'</p>';
}else if(!$user1->check_user($uid)){
echo "Invalid User";
}
}else{
echo "Incorrect";
}
?>
</pre>
</div>
</div>
<?php include_once('php/common/foot.php'); ?>
DB_CONFIG.php
<?php
class DBEngine
{
public $con;
public $errors;
public function __construct("LOGIN CREDENTIALS CANT SHOW")
{
try {
$this->con = new PDO("mysql:host=$host;dbname=$db",$user,$pass, array(PDO::ATTR_ERRMODE => PDO::ERRMODE_WARNING));
}
catch (Exception $e) {
$this->errors['connect']['message'] = $e->getMessage();
$this->errors['connect']['error_code'] = $e->getCode();
}
}
public function Fetch($_sql)
{
$query = $this->con->prepare($_sql);
$query->execute();
$this->errors['fetch'][] = $query->errorInfo();
if($query->rowCount() > 0) {
while($rows = $query->fetch(PDO::FETCH_ASSOC)) {
$array[] = $rows;
}
}
return (isset($array) && $array !== 0 && !empty($array))? $array: 0;
}
// Simple write to db method
public function Write($_sql)
{
$query = $this->con->prepare($_sql);
$query->execute();
$this->errors['insert'][] = $query->errorInfo();
}
}
// To use/initialize
$con = new DBEngine(); ?>
CLASS.USER.PHP
<?php
class User
{
public $db;
public $error;
public function __construct($con){
$this->db = $con;
}
/*** for login process ***/
public function check_login($username='', $password=''){
// Validate that your email is a real one
if(filter_var($username,FILTER_VALIDATE_EMAIL) !== false) {
$password = md5($password);
$sql = "SELECT uid from users WHERE (uemail='$username' or uname='$username') and upass = '$password'";
$result = $this->db->Fetch($sql);
if ($result !== 0) {
// this login var will use for the session thing
$_SESSION['emailusername'] = $result[0]['uemail'];
$_SESSION['uid'] = $result[0]['uid'];
$_SESSION['user'] = $this->get_fullname($result[0]['uid'],0);
$_SESSION['login'] = true;
}
else
$this->error['account'] = 'Invalid Username/Password';
}
else
$this->error['email'] = 'Invalid Email Address';
return (!isset($_SESSION['emailusername']))? false:true;
}
/*** for showing the username or fullname ***/
public function get_fullname($uid, $write = 1){
// --> You can prepare, bind, and execute your values here replacing what you have now....<--
$sql = "SELECT * FROM users WHERE uid = $uid";
$user_data = $this->db->Fetch($sql);
if($user_data !== 0) {
$user['fullname'] = $user_data['fullname'];
$user['uemail'] = $user_data['uemail'];
$user['uid'] = $user_data['uid'];
// This gives the option of returning an array (setting session array) or echoing
if($write == 1)
echo implode("<br />",$user);
else
return $user;
}
}
public function check_user($uid)
{
$sql = "SELECT * from users WHERE uid='$uid'";
$result = $this->db->Fetch($sql);
$count_row = ($result !== 0)? count($result): 0;
return ($count_row == 1);
}
/*** starting the session ***/
public function get_session()
{
return $_SESSION['login'];
}
public function user_logout()
{
$_SESSION['login'] = FALSE;
session_destroy();
}
}
?>
更新：
仍然出现错误：：：：Call to undefined method USER::FETCH() in line 16
您需要包含DBEngine class页面并仍然使用$con。
include_once('php/classes/DB_CONFIG.php');
您只包括User类页面，因此应该是：
// DB Class
include_once('php/classes/DB_CONFIG.php');
// User class
include_once('php/classes/class.user.php');
// $con is your DB class, and `Fetch` is in that class
$all = $con->Fetch("select * from users");
您忘记包含数据库类：
将此添加到脚本顶部：
include_once('path/to/DB_CONFIG.php');
$all=$user1->Fetch（"从用户中选择*"）；
将其更改为：
$all = $con->Fetch("select * from users");
//here con is construct parameter not an object
到此：
$all = $user1->Fetch("select * from users");