重新发现此错误 [英] Reslove this error

问题描述

if（isset（$ _ POST ['register']））{







$ email = $ _ POST ['email'];

$ username = $ _ POST ['username'];

$ password = $ _ POST [ '密码'];

$ cpassword = $ _ POST ['cpassword'];



//从表单<接收所有输入值< br $>
//表单验证：确保表单填写正确...

//通过添加（array_push（））相应的错误来解决$ errors数组

//唯一用户名或电子邮件

mysqli_select_db（$ db，user）;

$ count = 0;

$ res = mysqli_query（$ db，SELECT * FROM`user` WHERE username ='$ username'）;

$ count = mysqli_num_rows（$ res）;

$ countE = 0;

$ resE = mysqli_query（$ db，SELECT * FROM`user` WHERE email ='$ email'）;

$ countE = mysqli_num_rows（$ resE）;

if（$ count> 0）

{

？>



alert（此用户名已存在，请选择其他。）;



0）{

？>



alert（此电子邮件地址已被使用）;







alert（密码和确认密码不匹配）;









alert（记录添加可疑请登录页面）;



我尝试过：



i我收到此错误



警告：mysqli_num_rows（）要求参数1为mysqli_result，布尔值在第173行的C：\ xampp \ htdocs \ blha-blha \signup.php中给出



警告：mysqli_num_rows（）要求参数1为mysqli_result，布尔值在第176行的C：\ xampp \ htdocs \ blha-blha \ syignup.php中给出

我们如何重新开始这个

解决方案

_POST [注册']））{

email =

_POST ['email'];

if (isset($_POST['register'])) {



$email=$_POST['email'];
$username=$_POST['username'];
$password=$_POST['password'];
$cpassword=$_POST['cpassword'];

// receive all input values from the form
// form validation: ensure that the form is correctly filled ...
// by adding (array_push()) corresponding error unto $errors array
//unique username or email
mysqli_select_db($db,"user");
$count = 0;
$res=mysqli_query($db,"SELECT * FROM `user` WHERE username = '$username'");
$count=mysqli_num_rows($res);
$countE =0;
$resE=mysqli_query($db,"SELECT * FROM `user` WHERE email = '$email'");
$countE=mysqli_num_rows($resE);
if($count>0)
{
?>

alert("this username is already exist please choose another.");

0){
?>

alert("this email address is already use");



alert("password and confirm password was do not match ") ;




alert("record added susseful please go login page");

What I have tried:

i am get this error

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in C:\xampp\htdocs\blha-blha\signup.php on line 173

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in C:\xampp\htdocs\blha-blha\signup.php on line 176
how we reslove this

解决方案

_POST['register'])) {

email=

_POST['email'];

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