mysql_connect Error

I think you should try to make a simple PHP script (non-CodeIgniter) and see if you can connect. It's highly unlikely that CodeIgniter is your problem.

Code:

$mysqli = new mysqli("localhost", "user", "password", "database");
if ($mysqli->connect_errno) {
    echo "Failed to connect to MySQL: (" . $mysqli->connect_errno . ") " . $mysqli->connect_error;
}
echo $mysqli->host_info . "\n";

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