致命错误：未捕获的错误：调用一个成员函数FETCH_ASSOC（）布尔

Question

我试图连接到我的数据库时创建日志，但我得到这个错误：

Fatal error: Uncaught Error: Call to a member function fetch_assoc() on boolean

下面是代码：

<?php 

include 'database.php'; 
?> 

<?php 

// create a variable 
$email=$_POST['email']; 
$password=$_POST['password']; 


//Execute the query 

$sql = "SELECT * FROM user WHERE email='$email' AND password='$password'"; 
$result = mysqli_query($connect,$sql); 

if(!$row = $result -> fetch_assoc($result)){ 
    echo "Your email or password is incorrect!"; 
    } 
    else{ 
    echo "You are logged in!"; 
    } 

谢谢！

Answer 1

如果要实现登录代码试试这个，而不是

$sql = "SELECT * FROM user WHERE email='$email' AND password='$password'"; 
$result = mysqli_query($connect,$sql); 

if(mysqli_num_rows($result) == 1){ 
    echo "You are logged in!"; 
    } 
    else{ 
    echo "Your email or password is incorrect!!"; 
    } 

Answer 2

if ($result = mysqli_query($link, $query)) { 

    /* fetch associative array */ 
    while ($row = mysqli_fetch_assoc($result)) { 

    } 

    /* free result set */ 
    mysqli_free_result($result); 
} 

http://php.net/manual/en/mysqli-result.fetch-assoc.php

实施例2，其中采用mysqli_query功能可按。