Linux PHP/Propel Error

I moved my app to another test server, this one is red hat linux.  It uses from mysql, propel and php.  I am getting this error, does anyone know how to resolve it?



An error occurred

Application error

Exception information:

Message: Unable to open PDO connection [wrapped: could not find driver]
Jack_son_Asked:
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mcnuteConnect With a Mentor Commented:
Ok, i didn't know about that. I connected once a wordpress blog to a database on another machine and it took about three to four times loading the info out of the database into the blog as it did when the mysql server was on the same server. Maybe there is some network configuration in the mysql server to make before doing this, which I don't know of. But this constellation for me in that occasion was an aweful set up.
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themrrobertConnect With a Mentor Commented:
Yes, you have to install the php-pdo files from the yum repository. I can't remember exactly it's name, but

yum install *pdo*

Should do the trick.

Also, if you search for PHP in the add/remove software program and look for PDO you will find the software you need. (or Search for pdo and look for the php one, get it? )

Have fun :)
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themrrobertConnect With a Mentor Commented:
You're also going to need the driver, if it's mysql, you'll need php-mysql or similar, that should take care of you :)
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Jack_son_Author Commented:
Great, thanks, that error is gone, but now have this one:

Message: Unable to open PDO connection [wrapped: SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)]


Also, I have the db on a different server, would this be part of the problem?
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Dave BaldwinConnect With a Mentor Fixer of ProblemsCommented:
Yes since your error message says 'local MySQL server'.  This is the connection method I use for MySQL PDO.  Put the IP address or domain name of your remote server in as $dbhost.

$dbdsn = "mysql:dbname=$dbname;host=$dbhost";
$dbh = new PDO($dbdsn, $dbuser, $dbpass);

Open in new window

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mcnuteConnect With a Mentor Commented:
Mysql isn't menat to support cross server mysql connections. It is certainly possible to host your db on another server, but it takes a lot more time to load information through a constellation like that (mysql on one machine, website on another).

I strongly recommend you to install a mysql server on the machine your website is running and make up a localhost db connection to avoid heavy loading times.
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Jack_son_Author Commented:
It can't run to a backend db server?  In this case we cannot use the db on an internet facing server so it is not a choice.
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mcnuteConnect With a Mentor Commented:
in your host variable $host try to specify the ip address of the remote server of your db and then add the port/socket like so:

http://11.123.123.45:3306

Open in new window


3306 is the standard port for mysql connections.
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themrrobertConnect With a Mentor Commented:
it absolutely CAN be run as a backend server, the error you describe is because the script is trying to access the local server via the file descriptor.
you might try a different library to access mysql, or just make sure all the connection info is correct.

your question is answered above, please close this question and start a new one with the details of your current problem, that will ensure you get the best help.
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mcnuteConnect With a Mentor Commented:
you can find out about php mysql support methods running a phpinfo(); in a info.php file. There all of the drivers for mysql connection within php are listed.
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Dave BaldwinConnect With a Mentor Fixer of ProblemsCommented:
No, no, I connect to MySQL servers over the network and over the internet all the time.  Many hosting companies put their databases on different machines.  You just have to set up the connections correctly.  

A MySQL server on the same machine that your code is running on can be connected thru 'localhost'.  All servers on other machines require either the IP address or the domain name (along with the username and password) to connect.
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