The following code successfully connects me to my mySQL database.
$conn = mysql_connect("localhost", "root", "") or die("Failed to Connect!");
$db = mysql_select_db("MyDB");
I have been experimenting on localhost using XAMPP and phpmyadmin, and everything works correctly. However, today I uploaded my website to my domain (I have bought a domain and web hosting through GoDaddy) and I keep getting "Failed to Connect!" whenever this code runs. The HTML/CSS work correctly, but I cannot connect to mySQL. How can I connect to my database on the server?
You'll need to change your connection information here:
mysql_connect("localhost", "root", "")
to include your GoDaddy database details instead. Contact GoDaddy for more information on what to use for your account.
You have not mentioned anything about MySQL database hosting.
If you are hosting the database also in godaddy, you should be able to get the connection string and host name from information mentioned here
First, You need to create database in your hosting server (phpmyadmin cpanel) and supply details in your database connect file.
**Looking at your database credentials I can say that you haven't created one yet since
the username is definitely not 'root' and password will be required.**
Sample db_connect file:
<?php
$hostname = 'e.g: internal-ra.db-server-123';
$username = 'e.g: serverone1234d4';
$password = 'e.g: your_own_password';
try {
$pdo = new PDO("mysql:host=$hostname;dbname=database_name_here", $username, $password);
/*** echo a message saying we have connected ***/
}
catch(PDOException $e){
echo 'Exception -> ';
var_dump($e->getMessage());
}
?>
And try to use so less as possible the key DIE()
Related
Beginner question here. I am learning php and mysql. I have a website that I created using a local server. The database was linked to it fine on MAMP. I am now trying to upload it to a shared server using iPage. It will not connect.
Here is my code
<?php
$connect = mysqli_connect('host','user','password','db_name');
if (!$connect) {echo 'Could not connect';} ?>
I know the user, the password and the database name are correct. My only doubt is regarding the host. My website is in a subdomain. Should my code be:
<?php
$connect = mysqli_connect('subdomainName.domainName','user','password','db_name');
if (!$connect) {echo 'Could not connect';} ?>
or
<?php
$connect = mysqli_connect('domainName','user','password','db_name');
if (!$connect) {echo 'Could not connect';} ?>
or even
<?php
$connect = mysqli_connect('localhost','user','password','db_name');
if (!$connect) {echo 'Could not connect';} ?>
Do I need to do anything in my hosting page to link the database in any way. I have tried all options and nothing works. Thanks
Before implementing code you have to make new database in your website server,for this you have to log in to cpanel and make db in it, use that details and try the third one and use mysqli_connect_error() for getting the error details. like below.
Note: Better to use double quotes here because of string.
// Create connection
$conn = mysqli_connect("localhost", "username", "password");
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
if you are getting Connection failed: no such file or directory. then refer another question PHP - MySQL connection not working: 2002 No such file or directory
Better to contact your hosting provider if you are in shared hosting.
I just installed MAMP and have created a MYSQL database. I can access it via PHPMYADMIN.
In my php page I have this, pasted directly from the MAMP webstart page--
$user = 'root';
$password = 'root';
$db = 'local_db';
$host = 'localhost';
$port = 3306;
$link = mysql_connect(
"$host:$port",
$user,
$password
);
$db_selected = mysql_select_db(
$db,
$link
);
The resulting page stops at this point, won't print anything below these instructions.
I've tried changing the port in the MAMP preferences. I also included or die("Could not connect"); after the first line, but still don't get any text after the link data in the page.
I checked online, and others with the problem at least see the die text. I don't get that.
I haven't changed any passwords or data other than mess with the port number.
Any help would be appreciated!
Please give the following a try, I have developed and tested it locally, functionality within has been documented to help you understand what is going on in every step.
/**
*
* Modern method of connecting to a MySQL database and keeping it simple.
*
* If you would like to learn more about PDO,
* please visit http://php.net/manual/en/book.pdo.php
*
*/
//Set up database connection constants, so they cannot be changed.
define('DBHOST','127.0.0.1'); //Change this to the ip address of your database
define('DBNAME','test'); // Change this to the database name you are trying to connect to.
define('DBUSER','databaseuser'); // Insure this user is not the root user!!!!
define('DBPASS','databasepassword'); // Insure this is not the root password!!!!
//Let's try to connect to the database first.
try {
//Initiate a new PDO object called $MYDB and pass it the proper information to make
//the connection
$MYDB = new PDO("mysql:host=".DBHOST.";dbname=".DBNAME."", DBUSER, DBPASS);
//If we are successful show it :D for the test page, if this is for production you should not show this.
echo "Database connection was successful.";
//If this does not worth catch the exception thrown by PDO so we can use it.
} catch(PDOException $e) {
//Show that there was an issue connecting to the database. Do not be specific because,
//user's do not need to know the specific error that is causing a problem for security
//reasons.
echo "Oh, sorry there was an issue with your request please try again.";
//Since we had an issue connecting to the database we should log it, so we can review it.
error_log("Database Error" . $e->getMessage());
}
//Since this is 100% php code we do not need to add a closing php tag
//Visit http://php.net/manual/en/language.basic-syntax.phptags.php for more information.
If you have any issues with this please attempt to break it up into smaller pieces while reviewing the PDO documentation.
I'm working for an e-commerce that has the db on phpmyadmin. In another website I'd like to connect to that database. I have password, username and db name, so I'm using this "connection string":
<?php
$nomehost = "localhost";
$nomeuser = "user";
$password = "pass";
// connection
$conn=mysql_connect($nomehost,$nomeuser,$password);
if (!$conn) exit ("Error connection<br>");
// db name
if (!mysql_select_db("db_name",$conn)) exit("Error db name<br>");
?>
The result is "Error db name". What can I do? Have I to set some oprion in the phpmyadmin?
First of all:
this error is caused by the fact that you are selecting the wrong database in your MySql server. Is your db called db_name???
EDIT: based on the comments you are making: is the server that hosts the php page the same as the mysql server?
Then:
phpmyadmin is just a tool to connect and handle MySql databases and is not a database server itself.
Last but most important:
you are using a deprecated library (mysql) in php to connect to a MySql server. Please consider moving to mysqli or better to PDO
I have to build an android app which connects to a remote MYSQL webserver and retrieve information for display purpose.
So I did research coz I had no idea where to start. I read an article it mentions the better approach for that is to use php script. And didn’t know anything about how server, database and php works, so I studied php from here “http://www.homeandlearn.co.uk/php/php12p1.html” to understand and downloaded WhampServer to do some testing. On local machine everything worked fine.
But main thing I don’t understand is “HOW TO CONNECT TO REMOTE SERVER/DATABASE”.
It’s obvious that I’m doing something really stupid, I just need help to find out what am I doing wrong.
When we test php script on local machine in webrowse we use "localhost/some.php." But when I want to test same php script on remoter server from my local machine then what and how should I do? Do I need to make some changes in configuration file on server side?
I have done more research before asking this question here to understand remote server connection in php but I still don’t understand. I have gone through almost all the pages within the link below:
https://www.google.co.uk/search?q=connect+to+remote+mysql+webserver+php&rlz=1C1AVSX_enGB447GB448&oq=connect+to+remote+mysql+webserver+php&aqs=chrome.0.69i57j69i62l3.19724j0&sourceid=chrome&ie=UTF-8#fp=5a2359cf96dc5f79&q=how+to+connect+to+remote+mysql+web+server+php
And help would be much appreciated.
If my question is not clear please let me know I'll try to explain more. or think of it as if you have to connect to a remote MySQL server how would you do , means what is the process and steps involved in that.
Thanks everyone.
Edit
I have created a database "dealt3_raj_test" on remote server. and when I type "examplewebserver.CO.UK/myphpscriptname" in my web browser.
It gives me error "An error occurred , You have reached the error page"
<?PHP
$user_name = "dealt3_raj";
$password = "5dN5nh&eMd(vCR$dzk";
$database = "dealt3_raj_test";
$server = "examplewebserver.CO.UK";
$db_handle = mysql_connect($server, $user_name, $password);
$db_found = mysql_select_db($database, $db_handle);
if($db_handle)
{
print "Connected";
}
else
{
print "Can not connect to server";
}
if ($db_found)
{
print "DataBase found";
}
else
{
print "DataBase not found";
}
?>
Adding onto #user4035's comment, after opening the connection, use JDBC in your Android/Java code to interact with the database.
That said, it is not good practice. Rather create a web service
Your application may experience latency/connectivity issues. This will impact performance.
Your MySQL server will have to be open to remote connections which is strongly advised against
If your Android App is intended for public usage, it means the database username and password of your MySQL server reside on everyone's phone using your app. Encrypted or not this makes your database server a "step less" secure
Well answered here on SO (JDBC vs Web Service for Android)
use this code to connect with data base
$username = "database user name";
$password = "DB password";
$hostname = "hostname";
//connection to the database
$dbhandle = mysql_connect($hostname, $username, $password) or die("Unable to connect to MySQL");
//select a database to work with
$selected = mysql_select_db("data base name",$dbhandle) or die("Could not select examples");
I’ve just finished writing a website which is working very well on my local server (xampp).
The following is my connection database definitions for the local server:
<?php
$host="localhost";
$username="root";
$password="1234";
$db_name="partnership";
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
?>
I’ve loaded my files successfully and put them on the remote server (www.mydomain.com) and I’ve created the relevant database ‘partnership’ (successfully imported all Tables from phpMySQL local server to the remote server).
I can view the website (www.mydomain.com) but with no connection to the database (MySQL).
The error message is of course "cannot connect".
I’ve changed $host="localhost" to $host=”www.mydomain.com” but still getting the same error message.
Any assistance on the above issue would be greatly appreciated.
Shouldn't you still use localhost as $host if you're trying to connect via the application? The script is on the same server as the DB.
If you are using cPanel, when you create the MySQL table, make sure you assign your user to it (trivial, I know, but Ive forgotten about it a few times myself.)
If your script is running from your remote server, just stick with localhost. Will work fine.
Last, my only suggestion until a better answer is said, try using
$host = 'localhost';
$user = 'username'; // Im pretty sure your username isn't root.
$pass = '1234';
$db = 'partnership';
/* Alot of hosts like to append your cPanel login to your db and username fields.
Check to see what your table is. It might actually be 'youruser_partnership' */
$mysqli = new mysqli($host, $user , $pass, $db);
if (mysqli_connect_error()) {
die('Connect Error (' . mysqli_connect_errno() . ') ' . mysqli_connect_error());
}
If your host supports mysqli (most do). If not, when you do your die statement, still use die(mysql_error()); to get the exact error. It will more than likely be your username/password you created and assigned to your database
Ah, this is always the most annoying part of the process. Try this and see if it works:
$host="127.0.0.1"; // "localhost" should work, but don't count on it
$username="user"; // username you use to log into phpMyAdmin
$password="password"; // password you use to log into phpMyAdmin
$db_name="dbname"; // database you want to connect to
You'll need to have created this user/password pair and given them the appropriate permissions to access the database. Also note that the mysql PHP functions are deprecated and should not be used. PDO or mysqli are the preferred ones going forward.