Php 致命错误:未捕获错误:在null上调用成员函数dbConnect()
请帮帮我。。我的代码出了什么问题。我尝试创建登录表单并验证输入 致命错误:未捕获错误:调用上的成员函数dbConnect() 空的 (在Php 致命错误:未捕获错误:在null上调用成员函数dbConnect(),php,pdo,Php,Pdo,请帮帮我。。我的代码出了什么问题。我尝试创建登录表单并验证输入 致命错误:未捕获错误:调用上的成员函数dbConnect() 空的 (在$this->$db=$this->db->dbConnect();)上) 这是connection.php <?php class connection{ public $db_host = 'localhost'; public $db_name = 'login'; public $db_user = 'root';
$this->$db=$this->db->dbConnect();
)上)
这是connection.php
<?php
class connection{
public $db_host = 'localhost';
public $db_name = 'login';
public $db_user = 'root';
public $db_pass = 'root';
public function dbConnect()
{
try{
$conn = new PDO("mysql:host=".$this->db_host.";dbname=".$this->db_name,$this->db_user,$this->db_pass);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
}
catch(PDOException $e)
{
echo 'ERROR: ' . $e->getMessage();
}
return $this->conn;
}
}
?>
这是login.php
<?php
include_once('connection.php');
class User{
private $db;
public function __construct(){
$this->$db = new connection();
$this->$db = $this->db->dbConnect();
}
public function isAuthenticated($name, $pass){
if(!empty($name) && !empty($pass)){
$st = $this->$db->prepare("SELECT * FROM loginUser WHERE username =? AND password =?");
$st->bindParam(1, $name);
$st->bindParam(2, $pass);
$st->execute();
if($st->rowCount() == 1){
echo "User Verified";
}else{
echo "Incorrect UserName or Password";
}
}else{
echo "Please Enter User Name And Password";
}
}
}
?>
替换此:
$this->$db = new connection();
$this->$db = $this->db->dbConnect();
为此:
$this->db = (new connection())->dbConnect();
$this->db->prepare
这是:
$this->$db->prepare
为此:
$this->db = (new connection())->dbConnect();
$this->db->prepare
实际上,在每个地方,您都应该更换:
$this->$db
与
您对
$this->$db
的引用中有一个额外的$编辑了答案,请参阅。只是你的代码格式不好。它的工作。。。非常感谢你