I can't connect to MySQL on Openshift. There is nothing wrong in the parameter, but it doesn't want to connect.
$link = mysqli_connect("127.0.0.1","user","password","database") or die("Error" . mysqli_error($link));
What am I missing?
Your question seems is a bit a bit vague, but assuming you have a Openshift PHP application and want to connect to a Openshift MySQL cartridge, then you should not use hard coded IP addresses. Instead there is a whole range of environment variables which define the required properties, e.g. OPENSHIFT_MYSQL_DB_HOST. You need to use these variables. Using PHP you can read an environment variable like this:
$database_host = getenv('OPENSHIFT_MYSQL_DB_HOST');
You should use the environment variables to connect to your database, you can read more about them here (https://developers.openshift.com/en/databases-mysql.html), also, what is the error that is being displayed when your connection does not work?
I was having this issue when I was working with Angular JS earlier. When I would try to connect to the port 8080, I would get a connection error. After looking around online, I used port 3306 and that connected just fine.
I would recommend specifying a port to connect to. You can try the below line of code to see if it works.
mysqli_connect("127.0.0.1","user","password","database", 3306)
Related
I have found glimpses of the fact that it is possible to connect PHP to MySQL via pipes in their documentation of MySQLi, but I cannot, for the life of me, find anyone explaining what is needed.
The host parameter claims:
When possible, pipes will be used instead of the TCP/IP protocol.
But when is it "possible"? I have my own machine, and I definitely have the necessary privileges to achieve this, I just don't know how. Connecting to the host localhost reports "Localhost via UNIX socket" when examining the host_info.
Trying to follow one (downvoted) comment from that page, and connecting to host ., with socket parameter set to mysql, causes a 2002 connection error.
How do I tell it to (always) connect via a pipe instead?
Today I had the same issue and it required much time to solve this on Windows.
I can establish a named pipe connection with the following code:
$connection = new mysqli('.', 'user', 'pass', 'database', null, '\\\\.\\pipe\\name_of_pipe');
The server, where I want to connect to, has the following configuration:
[mysqld]
skip-networking
enable-named-pipe
socket=name_of_pipe
Using '127.0.0.1', 'localhost' or NULL as hostname doesn't work. Also you must specify a path to the named pipe and not just the name of the pipe.
Unfortunately the PHP documentation is a little bit weak here...
Named Pipes only work under Windows.
Also
Whenever you specify "localhost" or "localhost:port" as server, the MySQL client library will override this and try to connect to a local socket (named pipe on Windows). If you want to use TCP/IP, use "127.0.0.1" instead of "localhost". If the MySQL client library tries to connect to the wrong local socket, you should set the correct path as in your PHP configuration and leave the server field blank.
It is not mentioned in the actual PHP documentation, but it should be still valid.
I am new to php and I know this is a really stupid question to ask and I can be thrown out of the stack overflow community for this, but I'll ask it anyway.
Normally when we connect to localhost we write
if(!mysql_connect('localhost',$username,$password) || !mysql_select_db('user_transaction'))
{
echo 'Cannot process the requested operation';
}
else
{
// other code..
}
*But I want to connect to a domain in place of localhost like "http://myownsite.com" . *Can anyone please tell me as how can I achieve this?**
To connect to remote database you just have to replace "localhost" with your remote server's IP/hostname.
For example
mysql_connect('myownsite.com',$username,$password)
Three important things:
You provide an IP address od hostname without any protocol like "http" etc.
Your remote server needs to be configured to accept incoming connections on MySQL's port (iptables usually).
You remote MySQL server also needs to be configured to accept remote connections (my.ini).
P.S.
mysql extention is deprecated for long time. You should not use it at all. Use mysqli or PDO instead.
It's important to know where the mySQL is running on your remote host... for example, the most common way to connect to a mySQL database is using mysql.yoursitename.com. So your code would look like this:
mysql_connect('mysql.myownsite.com',$username,$password)
If you have your mySQL running on some other subdomain, just adjust as needed. But the above would be the most common way.
just use :
mysql_connect('myownsite.com',$username,$password)
I'm pretty new at php and I'm getting an error whenever I try to load a php page that requires access to the database I set up on phpMyAdmin
Here is the error:
Database connection failed: Can't connect to local MySQL server
through socket '/tmp/mysql.sock' (46) (2002)
The code I'm using for the connection is this:
<?php
define("DB_SERVER", "localhost");
define("DB_USER", "xxxx");
define("DB_PASS", "xxxx");
define("DB_NAME", "tester");
$connection = mysqli_connect(DB_SERVER, DB_USER, DB_PASS, DB_NAME);
// Test if connection occurred.
if(mysqli_connect_errno()) {
die("Database connection failed: " .
mysqli_connect_error() .
" (" . mysqli_connect_errno() . ")"
);
}
?>
I set up phpMyAdmin on my server by following the directions from the site that hosts my website, so I'm pretty sure I did that correctly.
I've been able to get databases to work before on my computer by using WAMP, but this is the first time I've actually tried getting everything working online, so I don't know if this is a stupid error on my part, or if it's something bigger.
I don't know what a socket is either so I'm not sure how to troubleshoot this.
Thanks for your help!!
You have to find a way to connect to your MySQL instance. There are two ways, TCP (networking, even if that network address is 127.0.0.1) and sockets (a file such as /var/run/mysqld/mysql.sock). Generally, MySQL is configured out of the box to listen on both, and again in general there's little difference between the two. You have to be careful when creating or editing permissions that they match the connection type, user bob#localhost is different from user bob#127.0.0.1. I tend to use sockets and that's also what your script is trying to do by default. You could tell it to connect via TCP, but it's just as easy to tell it the proper path to the socket.
Anyway, for me the quickest way to figure it out is to try the command line tool. If you can do mysql -u root -p at the command line and get a MYSQL> shell prompt, type in "STATUS" and look for the Connection line, which might read Localhost via UNIX socket; and a bit further down you might see a line like "UNIX socket: /var/run/mysqld/mysql.sock" in which case you just tell your PHP script or global PHP configuration about the socket path, because right now it's looking in /tmp/mysql.sock which doesn't exist.
You can also see this when you log in to phpMyAdmin, it should display on the right hand side of the page some "Database Server" information -- look here for the "Server" line which might read something like "phpMyAdmin demo - MySQL (192.168.30.23 via TCP/IP" (a clear indication you're connecting over TCP).
Anyway, whichever method you use to find the path to the socket or deciding to use TCP networking, see the PHP manual page for information about using that to connect. You can also just set the global path in php.ini for the socket (which is what I'd suggest you do), then you don't have to set it manually in each script as it just uses the php.ini setting as a default. You may need to set each of the values for pdo_mysql.default_socket, mysql.default_socket, and mysqli.default_socket (though in your code you're only using mysqli, so technically you only need to set the last value...but why risk confusing your future self with questions like "why would mysqli work but pdo fail?" -- just set them all now and don't worry about it).
Hope this helps.
That either means you don't have the privileges to access phpMyAdmin or that socket isn't there. Try reinstalling phpMyAdmin.
I get this everytime I use mysql_connect() no matter what database I choose:
Warning: mysql_connect() [function.mysql-connect]: Can't connect to MySQL server on 'IP' (111) in filename.php on line 17
A MySQL error has occurred: Can't connect to MySQL server on 'IP' (111)
The exact same file works on my personal website fine. I have tried multiple databases hosted on different servers and it always gives that output.
The database itself is hosted on the same server, but using its full IP in mysql_connect(). Using localhost:port doesn't work either as it says:
Warning: mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) in filename.php on line 17
A MySQL error has occurred: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
But using the IP should work as it has worked calling it via the same file hosted on other servers.
This is the code:
$connect = mysql_connect($db_url,$db_user,$db_pass); // connects
if ($connect == false) exit("A MySQL error has occurred: " . mysql_error());
Now since the file works on other servers i am guessing it is something to do with the server it is on and might need something changed. I don't personally have root access to the server (just my part of the shared host). Is there anything I can do i php, editing the php.ini file or something I should pass on to someone with root access?
Edit: Ok it turns out that the server doesn't have access to outside databases, so thats why the IP didn't work. Thanks for all your answers but we have decided simply to change hosting provider. We need to be able to access an outside database.
This is on a hosting service? Check their documentation, there will be something that tells you where to find mysql. It isn't necessarily localhost.
For example, on startlogic.com, you use: yourdomain.startlogicmysql.com
Can you connect using mysqladmin using the same host, username and password?
mysqladmin -h $db_url -u $db_user -p $db_pass
Replace $db_xxxx with real values.
If that works from the same host as your php script, then sudo to the apache User and try the same test. One of those must be failing.
EDIT: nevermind on sudo part, I noticed that you don't have root access.
Something else to try: Use '127.0.0.1' instead of 'localhost'. I have had issues before where mysql stupidly assumed it could silently change 'localhost:' to '/var/run/mysqld/mysqld.sock'.
Your wording is not very clear, I hope you are not thinking you can connect to the same mysql server from any old web server just because you know the IP address and port number. If the web host is at all competent, they have probably firewalled mysql so it is only accessible through their own web servers.
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.