无法连接到PHP中的MySQL数据库

Question

I have a php file that holds my login details named "connect.php".

    $host = 'localhost';
    $username = 'username';
    $password = 'password';
    $database = 'database';

And I'm trying to connect with another file (html) with this as its contents:

    $a = file_get_contents("http://example.com/folder/connect.php");
    echo ($a);
    mysql_connect ("$host", "$username", "$password");  
    @mysql_select_db($database) or die("Unable to select database");  

And it keeps on giving me this error:

    Warning: mysqli_connect() [function.mysqli-connect]: (28000/1045): Access
    denied for user '**wrong username**'@'localhost' (using password: NO) in
    /home/path/public_html/repo/path/downloads.php on line 40

Answer 1

Instead of

$a = file_get_contents("http://example.com/folder/connect.php");
echo ($a);

You should be using require / include :

require_once '/folder/connect.php';

Your current code still won't work using HTTP since you'd need to eval or parse the result to assign your $username and $password variables, just outputting the result of the PHP script doesn't assign any variables.

You shouldn't need to (or be able to) use http to download your MySQL connection information through HTTP especially with no authentication. That is a big security issue. If that is your setup you should change it, so that you have a local configuration file stored outside of your web root which has your db host, username, and password in it.

Answer 2

you should use include instead of file_get_contents in order to get the connect.php interpreted as a php file:

include '/path/to/connect.php';