获取错误警告：mysqli_query（）要求参数1为mysqli，第10行的C：\ xampp \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\

问题描述

register.php

 <？php  
 if（isset（$ _ POST） [  register]））{
 $ firstname = $ _ POST [  first_name]; 
 $ middlename = $ _ POST [  middle_name]; 
 $ surname = $ _ POST [  surname]; 
 $ username = $ _ POST [  username]; 
 $ email = $ _ POST [  email]; 
 $ password = md5（$ _ POST [  password_1]）; 
 $ query_reg =   INSERT INTO tbl_users VALUES（''，'$ firstname'，'$ middlename'， '$姓'， '用户名$'， '$电子邮件'， '$口令'， ''）; 
 $ result_obj = mysqli_query（$ conn，$ query_reg）; 
 if（$ result_obj）{
 ？>  
 <？ php 
  $ db_host  =   localhost ; 
  $ db_username  =   root; 
  $ db_password  =  ; 
  $ db_name  =   cive_orsp; 
 try {
  $ conn  =  new  PDO（  mysql：host = $ db_host; dbname = $ db_name，$ db_username，$ db_password）; 
 $ conn-> setAttribute（PDO :: ATTR_ERRMODE，PDO :: ERRMODE_EXCEPTION）; 
  echo    Succefully Connected; 
} catch（PDOException $ e）{
 die（ 数据库异常 。$ E->的getMessage（））; 
} 
 
 ？>  

我尝试了什么：



i试图将我的注册页面连接到数据库

解决方案

register.php

<?php
if(isset($_POST["register"])){
    $firstname=$_POST["first_name"];
    $middlename=$_POST["middle_name"];
    $surname=$_POST["surname"];
    $username=$_POST["username"];
    $email=$_POST["email"];
    $password=md5($_POST["password_1"]);
    $query_reg="INSERT INTO tbl_users VALUES('','$firstname','$middlename','$surname','$username','$email','$password','')";
    $result_obj=mysqli_query($conn,$query_reg);
    if($result_obj){
?>
<?php
$db_host = "localhost";
$db_username = "root";
$db_password = "";
$db_name = "cive_orsp";
try{
    $conn = new PDO("mysql:host=$db_host;dbname=$db_name", $db_username,$db_password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Succefully Connected";
}catch(PDOException $e){
    die("Database Exception ".$e->getMessage());
}

?>

What I have tried:

i was trying to connect my registration page to database

解决方案

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