使用php Fail连接到Mysql数据库

Question

嗨所以我正在尝试使用mysql和php创建一个登录系统，但我不断收到错误

  

警告：mysql_connect（）：拒绝访问用户＆＃39; testuser＆＃39; @＆＃39; localhost＆＃39; （使用密码：YES）在第10行的E：\ PHP_Runner \ php \ root \ process.php中

用户的创建方式如任何建议/帮助？

所示

<?php
$username = $_POST['user'];
$password = $_POST['pass'];

$username = stripcslashes($username);
$password = stripcslashes($password);
$username = mysql_real_escape_string($username);
$password = mysql_real_escape_string($password);

mysql_connect("localhost",$username, $password) or die("Could not connect to database");
mysql_select_db("users");

$result = mysql_query("select * from users where username = '$username' and password = '$password'")
        or die("Failed to query database" .mysql_error());

$row = mysql_fetch_array($result);
if($row['username'] == $username && $row['password'] == $password){
echo "Login success !! welcome".$row['username'];
}else{
    echo "Failed to login";
}

?>

Answer 1

要连接到mysql db phpmyadmin或任何接口，您需要拥有不是用户登录凭据的mysql登录凭据，这通常是在安装mysql时设置的，或者您将使用默认值。现在这个设置凭据将替换mysql_connect("localhost", $TheSetUserNameForMysqlDb, $TheSetPasswordForMysqlDb)我希望这个帮助

  

我建议不要使用默认

Answer 2

mysql connect应该像

<?php
 $main_url="webpage";
 $str = file_get_contents($main_url);

 // Gets Webpage Title
 if(strlen($str)>0)
 {
  $str = trim(preg_replace('/\s+/', ' ', $str)); // supports line breaks inside <title>
  preg_match("/\<title\>(.*)\<\/title\>/i",$str,$title); // ignore case
  $title=$title[1];
 }

 // Gets Webpage Description
 $b =$main_url;
 @$url = parse_url( $b );
 @$tags = get_meta_tags($url['scheme'].'://'.$url['host'] );
 $description=$tags['description'];

 // Gets Webpage Internal Links
 $doc = new DOMDocument; 
 @$doc->loadHTML($str); 

 $items = $doc->getElementsByTagName('a'); 
 foreach($items as $value) 
 { 
  $attrs = $value->attributes; 
  $sec_url[]=$attrs->getNamedItem('href')->nodeValue;
 }
 $all_links=implode(",",$sec_url);

 //Gets Webpage images
 require_once('C:\xampp\htdocs\simple_html_dom.php');
 require_once('C:\xampp\htdocs\url_to_absolute.php');
 $url='webpage'
 $html=file_get_html('webpage');
foreach($html->find('img') as $element) {
    echo url_to_absolute($url, $element->src), "\n";
}
$images=

 // Store Data In Database
 $host="localhost";
 $username="root";
 $password="";
 $databasename="db";
 $connect=mysql_connect($host,$username,$password);
 $db=mysql_select_db($databasename);

 mysql_query("insert into webpage_details values('$main_url','$title','$description','$all_links','$images')");

?>