How to connect database in PHP with MySQL?

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Here is my code. It cannot connect to database.

PHP

class connect{
        // Check MySQL
        function chkmys(){
            if (mysql_errno()>0) die("MySQL error ".mysql_errno()." : ".mysql_error());
        }
        // Open a connection
        function open(){
            $hst = "127.0.0.1";
            $usr = "root";
            $pwd = ""; //KsfHMyDb#
            $dbs = "mine_db";
            $vsr = "D:\wamp\bin\mysql\mysql5.0.51b\data";
            if(file_exists($vsr)) {
                $cnx = mysql_connect($hst,$usr,$pwd);
                /* if (!$cnx) die('Failed to open connection to MySQL server');*/
                mysql_select_db($dbs,$cnx);
                connect::chkmys();
                return $cnx;
            }
        }
        // Close a connection
        function close($cnx){
            mysql_close($cnx);
            }
        }

Posted 6-Dec-11 17:09pm

phanny 2011

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phanny 2011 6-Dec-11 23:10pm

The output of this code is No database selected.

2 solutions

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Kim Togo · Answer 1 · 2011-12-06T20:32:00

Solution 1

The code is more or less correct. You do not need to check if the path exists ( file_exists ).
Just call mysql_connect and it will fail if the MySQL is not available.

Please see examples on http://php.net/manual/en/function.mysql-connect.php[^]

Posted 6-Dec-11 20:32pm

Kim Togo

Michel [mjbohn] · Answer 2 · 2011-12-06T21:53:00

User root does not necessarily have rights on all DBs.
If you have access to the DB please try this:

-Login in as root
- Do this query:

show grants for root@localhost;

It should give you this:

GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' IDENTIFIED BY PASSWORD '<some_encrypted_pw>' WITH GRANT OPTION</some_encrypted_pw>

The important part is

PRIVILEGES ON *.*