I need to connect to a remote database server with PHP to query and return data.
So far, I have tried this:
$connection = mssql_connect('[redacted]:1433\SQLEXPRESS', '[redacted]', '[redacted]');
and
$connection = mssql_connect('[redacted]', '[redacted]', '[redacted]');
Both result in FALSE, but no error thrown. What am I missing? It doesn't even seem to attempt to connect (fails very quick).
Usually this isn't so much about the connection code as the setup of the external DB server. First try this:
$connection = mssql_connect('[redacted]\SQLEXPRESS', '[redacted]', '[redacted]');
But you are connecting to SQL Express which by default doensn't accept any incoming TCP/IP requests, so if that doesn't work out, you'll need to check the configuration (or if it's truly external, have the DBA check it) and make sure:
it's set up to accept TCP/IP requests,
that the firewall is allowing that IP and port through, and
that the specific IP address your request is coming in on is accepting requests
Good answer by AlexC, but what I wound up doing was converting the MSSQL database over to MySQL and performing the migration with the Migrate framework (Drupal).
Related
I have a .php file which should receive and show data from a remote database. I run my program from PHPStorm (which is connected to the remote database through the "Database" right-hand pane) and a browser. Both ways I get an error which depends on the number of arguments I pass to pg_connect() function.
If I use
$dbconn = pg_connect("host=pg hostaddr=server.address.ru port=5432 dbname=studs user=... password=...")
than the error is
Unable to connect to PostgreSQL server: could not parse network address "server.address.ru": Unknown host in...
But I am sure that I wrote the address correctly (there are no typos in it). This way I am not sure about the correctness of the format of the passed arguments.
If I use
$dbconn = pg_connect("host=server.address.ru dbname=studs user=... password=...")
command, the error is
pg_connect(): Unable to connect to PostgreSQL server: could not connect to server: Connection timed out
I found a lot of information about this errors, but it mostly refers to localhosts and doesn't solve my problem. I guess, the problem can be in the way this connection is set in the function, but I do not know why it doesn't work properly. How can I solve it?
Thanks to #TangentiallyPerpendicular, I got on a right way of setting the connection. But since I have PostgreSQL remote connection, it wasn't just up to this answer.
What I did and how I set the connection (I work from PHPStorm so all the actions are based on this platform):
Open PuTTY and set an SSH connection (an SSH tunnel) between the server's DB port (for PostgreSQL it's usually 5432) and your local computer's PostgreSQL port (5432 most often too). You can do the same from a command line.
Open PHPStorm and in "Database" section (an icon on the right-hand side of the environment or "Data Sources and Drivers" in Settings) set general information ("General" section) and set another SSH tunnel ("SSH/SSL"). In SSH Configurations (the same "SSH/SSL" section) set a local port - it will be important in our connection! Let's say, this port is 20000. The port of the server you're connecting to is a usual one (usually 22 or 2222).
In the program the right use of function is $dbconn = pg_connect("host=localhost port=20000 dbname=studs user=... password=...") or die('Error: ' . pg_last_error());
The connection is set.
For those who has troubles setting an SSH tunnel with a remote PostgreSQL from PHP this can be useful too.
I am facing a little problem when i am trying to access to a remote server (no localhost) for my sql database. Normally, we need to pass throught a http authentication to access to the mysqladmin page, but i managed to go to the page with that line : http://user:password#site.net/mysqladm...
And it works.
I have also disabled the login confirmation's browser for the HTTP authentication.
Now, when i want to make it work on my php code, it is not working.
In localhost, it is working.
This is what I write on my code :
mysqli_connect('http://httpuser:httppassword#site.net/mysqladmin/index.php', 'root', 'password', 'db');
Do you have any issues for my problem ?
Regards,
mysqli_connect expects a host or IP address, to a MySQL database server, as first parameter.
You instead are passing a http link site.net/mysqladmin/index.php, which is just a administration backend that connects to the configured MySQL server. You need to determine the IP of the MySQL server which the backend is connecting to. Make sure that the firewall allows incoming connections on your configured port (default: 3306)
<?php
mysqli_connect('IP or host of the MySQL server', 'root', 'password', 'db');
?>
I'm trying to learn to use SQL stuff in PHP but I'm having an issue simply connecting to my database.
The database is almost certainly working with remote access to some extent. I disabled iptables temporarily (I know, bad bad bad!), so there's no firewall blocking access. The MySQL user I am using is configured to be able to connect from any IP. The SQL server is listening properly to all connections and is run on a Linux dedicated server.
[root#1742CC-XEON ~]# netstat -lpnut | grep mysql
tcp 0 0 0.0.0.0:3315 0.0.0.0:* LISTEN 3915/mysqld
I've also used the exact same credentials to successfully remotely connect to my database in Java, like so:
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection("jdbc:mysql://__ip__:_port_/_dbname_", "username", "password");
System.out.println("Connection established.");
This functions just fine, and I can successfully run queries, etc. Since I have iptables disabled at the moment this connection functions just fine anywhere that has Java and the Java SQL connector.
Now, I'm trying to connect to the same database in PHP:
$db = mysqli_connect($sql_host, $sql_user, $sql_pass, $sql_db, $sql_port);
And this connection fails with the following error:
Warning: mysqli_connect(): (HY000/2003): Can't connect to MySQL server on 'xx.xx.xx.ip' (111)
Note that $sql_user, $sql_pass, $sql_host, etc. are all the same as the credentials used in the Java connection, so there shouldn't be any issue with the user not being able to access the server from a new IP, since that user is granted access on % and I've made sure that it is indeed able to access the SQL server from multiple IPs not explicitly allowed in the users table. I've also tried different users, including root, and all give the same connection error.
I've spent a few hours looking around but I honestly can't find anything that seems to be the right answer, would really appreciate any help!
Is it possible that this is caused by my webhost? I've tried this script on HostGator webhost as well as the whois.com hosting and both give the same error. Could they possibly be preventing the PHP script from connecting to the remote database?
Have you tried telneting to the server on 3315 from your webhosts?
I want one website on one server and another website on another server, but only 1 database for both using php and mysql.
is it possible? if yes then how?
Yes. its possible. Normally you dont put your db on distant server. You should keep the db server on same data center so you avail high speed internal network link.
If your websites are in host web1 and web2 and database is in dbhost1, then in web1 and web2 connect to mysql with dbhost1 as host name.
mysqli
$mysqli = new mysqli("dbhost1", "user", "pass");
PDO
$dbh = new PDO('mysql:dbname=dbname;host=dbhost1', "user", "pass");
Legacy mysql extension
mysql_connect("dbhost1", "user", "pass");
Note: Make sure in the database user#web1 (on host web1) or user#web2 (on host web2) has access.
You can connect to a remote database given the correct settings.
Failing that, you could write a service layer that could be called from both servers.
while connecting to mysql database use same database connection credential on both servers.
Yes why not. But for security and performance issues i wouldn't do that.
The question is what do you understand under on another server is the server direct connected over LAN or is the server in another Data center. When the server is in another Data center you can get a lot of traffic and performance issues.
When the server is direkt connected you can change the my.cnf and change the line:
bind-address 127.0.0.1
then the server is reachable from outside. And you should give the user enough rights to connect from outside.
yes, it's possibile.
you have to use a mysql server which is reachable from both servers. and you simply connect with the same host/user/pass from both servers:
define("WEBDOMAIN", "94.145.22.15"); //some fake data
define("DEFDBNAME", "my_db");
define("DEFUSERNAME", "my_user");
define("DEFDBPWD", "my_pass");
mysql_connect( WEBDOMAIN, DEFUSERNAME, DEFDBPWD );
mysql_select_db( DEFDBNAME);
That should be enaugh. You coud have some problems if your hosting providers doesn't allow servers to connect to external servers (sometimes ports are closed).
For security reasons it is common, that You can't connect to a mysql server that has not authorized your hosting server.
So in mysql, You have to allow a user to connect not only from localhost, but also from other host (if You have enought priviliges, You can do it from phpMyAdmin by editing user priviliges afair).
Ok, If you can answer this question, you deserve the nobel peace prize. Anyways, here's the situation.
I'm using Slicehost dot net, and I have 2 slices (two different IPs). One slice is my mail server and the other is my normal website. I'm running Ubuntu (8.04 or 8.10, something like that, it shouldn't matter). What I'm trying to do is access the MySQL database on the Mail server from the other slice. I'm trying to do that with PHP. I really appreciate any help.
mysql_connect()
$resource = mysql_connect('other-server-address.com', 'username', 'password');
The first parameter is the mysql server address.
Server Param
The MySQL server. It can also include
a port number. e.g. "hostname:port" or
a path to a local socket e.g.
":/path/to/socket" for the localhost.
If the PHP directive
mysql.default_host is undefined
(default), then the default value is
'localhost:3306'. In SQL safe mode,
this parameter is ignored and value
'localhost:3306' is always used.
Unless I'm misunderstanding... this setup is pretty common. Any trouble you're having might be related to the following:
Firewall settings
Grant access to the mysql user to connect from the other host
my.ini settings not allowing outside connections
Some other related SO questions:
Connecting to MySQL from other machines
How do I enable external access to MySQL Server?
php access to remote database
How to make mysql accept connections externally
Remote mysql connection
Assuming your mail server is at IP 192.168.1.20 and web server is 192.168.1.30
First of all you need to allow the web server to access the mysql database on your Mail server .
On 192.168.1.20 you run the mysql command and grant access on the database needed to your web server
mysql> grant all on mydb.* to 'someuser'#'192.168.1.30' identified by 'secretpass;
Your PHP code connects to that database with something like:
$conn = mysql_connect('192.168.1.20', 'someuser', 'secretpass');
mysql_connect() returns a link identifier if the connection is successful. Also you have to do is keep the references to both links.
When you want to use which ever link, simply include the link as an argument.
$link1 = mysql_connect($host1, $username1, $password1);
$link2 = mysql_connect($host2, $username2, $password2);
$r = mysql_query(QUERY, $link1);
Simple as that.