如何解决这个问题警告：mysqli_num_rows（）要求参数1为mysqli_result，在C：\ xampp \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\ [英] How to solve this problem warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in C:\xampp\htdocs\dealtm\customers\customer_login.php

问题描述

Hello Everyone



警告：mysqli_num_rows（）要求参数1为mysqli_result，布尔值在C：\ xampp \htdocs \dealtm \customers中给出第57行\ customer_login.php



我在我的网站上面对这个问题请帮我解决这个问题

这是我的php



我尝试过：



<？php



if（isset（$ _ POST ['c_login']））{



global $ db; < br $>


$ customer_email = $ _POST ['c_email'];

$ customer_pass = $ _POST ['c_pass'];



$ sel_customer =select * from customers where customer_email = $ customer_email AND customer_pass = $ customer_pass;



$ run_customer = mysqli_query（$ db，$ sel_customer）;



$ check_customer = mysqli_num_rows（$ run_customer）;



$ get_ip = getUserIP（）;



$ sel_cart =select * f rom cart where ip_add ='$ get_ip';



$ run_cart = mysqli_query（$ con，$ sel_cart）;



$ check_cart = mysqli_num_rows（$ run_cart）;



if（$ check_customer == 0）{



echoalert（'电子邮件或密码不正确！，请再试一次'）; ;

退出（）;

}



if（$ check_customer == 1 AND $ check_cart = = 0）{



$ _SESSION ['customer_email'] = $ customer_email;



echowinodw 。开（ '客户/ my_account.php'， '_自我'）; ;



}



else {

include（customers / payment_option.php）;

}



}



？> ;

Hello Everyone

Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in C:\xampp\htdocs\dealtm\customers\customer_login.php on line 57

I am facing this probelem on my webstie please help me to solve this
Here it is my php

What I have tried:

<?php

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

global $db;

$customer_email = $_POST['c_email'];
$customer_pass = $_POST['c_pass'];

$sel_customer = "select * from customers where customer_email=$customer_email AND customer_pass=$customer_pass";

$run_customer = mysqli_query($db, $sel_customer);

$check_customer = mysqli_num_rows($run_customer);

$get_ip = getUserIP();

$sel_cart = "select * from cart where ip_add='$get_ip'";

$run_cart = mysqli_query($con,$sel_cart);

$check_cart = mysqli_num_rows($run_cart);

if($check_customer==0){

echo "alert('Email or Password is not correct!, Please Try Again'); ";
exit();
}

if($check_customer==1 AND $check_cart==0){

$_SESSION['customer_email']=$customer_email;

echo "winodw.open('customers/my_account.php','_self'); ";

}

else {
include ("customers/payment_option.php");
}

}

?>

推荐答案

_POST ['c_login']））{



global

_POST['c_login'])){

global

db;

db;

customer_email =

customer_email =

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