用户"@'localhost"的访问被拒绝(使用密码:NO) [英] Access denied for user ''@'localhost' (using password: NO)

问题描述

尝试使用以下代码连接到localhost sql db(此时不对查询做任何事情，只是想执行查询):

Attempting to connect to localhost sql db using the following code (Not doing anything with query at this point just want the query to execute):

<?php

$host     = "localhost";
$port     = 3306;
$socket   = "";
$user     = "root";
$password = "Password1";
$dbname   = "CIIP_WIKI";

$con = new mysqli($host, $user, $password, $dbname, $port);

if(!$con)
{
echo ("db connection failed!");
die ('Could not connect to the database server' . mysqli_connect_error());
}

else {
    echo ("db connection established.");
    echo ("<br/>");
    }

$query = sprintf("SELECT first_name FROM actor WHERE actor_id='1'");

$result = mysql_query($query);

$con->close();

?>

我不断收到以下消息...

I keep getting the following...

Welcome

db connection established.

Warning: mysql_query(): Access denied for user ''@'localhost' (using password: NO) in C:\Program Files (x86)\EasyPHP-12.1\www\Cisco Wiki\index.php on line 31

Warning: mysql_query(): A link to the server could not be established in C:\Program Files (x86)\EasyPHP-12.1\www\Cisco Wiki\index.php on line 31

为什么这不起作用?

推荐答案

这是因为您使用mysqli_创建连接，然后使用mysql_尝试获取结果.它们是不同的API.

This is because you create a connection using mysqli_ and then use mysql_ to try to fetch your result. They are different API's.

<?php
$link = mysqli_connect('localhost', 'my_user', 'my_password', 'my_db');

if (!$link) {
    die('Connect Error (' . mysqli_connect_errno() . ') '
            . mysqli_connect_error());
}

echo 'Success... ' . mysqli_get_host_info($link) . "\n";

mysqli_close($link);
?>

请参见手册

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