Question

我无法正确使用此代码：

$connection=mysql_connect(db_server, db_user, db_pass);
if(!$connection)
{
  die("Database Connection failed".mysql_error());
}

$db_select=mysql_select_db(db_name,$connection);
if(!$db_select)
{
  die("Database Selection failed".mysql_error());
}

当我尝试脚本时，它说：

解析错误：语法错误，第3行/home/a8592246/public_html/pic/include/connect.php中的意外T_DNUMBER

如果可能，任何人都可以使用正确的设置复制并粘贴代码吗？

$mysql_host = "mysql16.000webhost.com";
$mysql_database = "a8592246_dbname";
$mysql_user = "a8592246_dbuser";
$mysql_password = "mypassword";

Answer 1

第二个}语句中缺少

if，并在mysql_connect和mysql_select_db个函数中使用了正确的参数请尝试此代码

         $mysql_host = "mysql16.000webhost.com";
         $mysql_database = "a8592246_dbname";
         $mysql_user = "a8592246_dbuser";
         $mysql_password = "mypassword"; 



            $connection=mysql_connect( $mysql_host,$mysql_user,$mysql_password);
            if(!$connection){
               die("Database Connection failed".mysql_error());
            }

            $db_select=mysql_select_db( $mysql_database,$connection);
            if(!$db_select) {
               die("Database Selection failed".mysql_error());
             }

Answer 2

我不使用mysql_connect，因为最好使用PDO或ADOdb，但lemme试一试！试试这段代码：）

    $connection=mysql_connect("mysql16.000webhost.com", "a8592246_dbuser", "mypassword");
    if(!$connection)
    {
    die("Database Connection failed".mysql_error());
    }

    $db_select=mysql_select_db("a8592246_dbname",$connection);
    if(!$db_select)
    {
    die("Database Selection failed".mysql_error());
    }

Answer 3

mysqli_connect(host,username,password,dbname);

host: you need to write here IP address or the name of the host you are working on eg:
mysqli_connect("localhost",username,password,dbname);

username: you need to mention the username here eg:
mysqli_connect(host,"root",password,dbname); 

password: write password if any.

dbname: write name of the db you want to connect with. eg.
mysqli_connect(host,username,password,"my_db");

在你的情况下：

$mysql_host = "mysql16.000webhost.com";
$mysql_database = "a8592246_dbname";
$mysql_user = "a8592246_dbuser";
$mysql_password = "mypassword";

mysqli_connect($mysql_host, $mysql_user,$mysql_password,$mysql_database);

Answer 4

根据您提供的代码，请参阅以下内容： -

$mysql_host = "mysql16.000webhost.com";
$mysql_database = "a8592246_dbname";
$mysql_user = "a8592246_dbuser";
$mysql_password = "mypassword";


    $connection=mysql_connect($mysql_host, $mysql_user, $mysql_password);
    if(!$connection)
    {
         die("Database Connection failed".mysql_error());
    }

    $db_select=mysql_select_db($mysql_database,$connection);
    if(!$db_select)
    {
       die("Database Selection failed".mysql_error());
    }

在现有代码中， mysql_connect（）功能和 db_name

中缺少 $

Answer 5

尝试使用 mysqli _connect而不是 mysql _connect

<?php

     $con=mysqli_connect(db_server,db_user,db_pass,"database_name");

  /** Check connection **/
  if (mysqli_connect_errno())
  {
      echo "Failed to connect to MySQL: " . mysqli_connect_error();
  }
  else{
      echo "Connection established ";
  }

mysqli_close($con);
?>

无法使用PHP连接到数据库

5 个答案: