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Simple Php Mysql Connection Test Script Example

Posted On Tue Feb 05, 2008 By hostman In MySQL Forums And Topics Discussions About Open Source Database Forums

as a php programmer, sometimes you need to create scripts with an install for the installation of the script. and you want to test the mysql database connection before you install it. today i was writing a script and i wanted to take the user through the installation process and one of the steps was to test the mysql database connections, if the connections fails, then the user is prompted to enter the database details again, if its successful, then it continues with the next step in the instalation process. so you can use this:

you have two options:

OPTION 1 - IF you dont want to create the files yourself, Webune has provided the full script, you can download the .zip file by going to this post: How To Test Mysql Database Connection

OPTION 2 - You can follow the steps below to create the script yourself:

1. first step is to copy and paste the following code into your texteditor. if you are using windows, you can use notepad.

PHPCODE: [ testmysql.php ]

<?php
ini_set('display_errors', 1); // DISPLAY ANY ERRORRS ON SCRIPT
###################################### C O P Y R I G H T S ####################################
# THIS SCRIPT IS DISTRIBUTED BY WEBUNE.COM UNDER LICENSE UNDER THE GPL RULES
# PLEASE DO NOT REMOVE THIS MESSAGE IN SUPPORT OF OUR HARD WORK TO CONTINUE TO PROVIDE FREE SUPPORT
###############################################################################################
# OK, HERE WE GO
# Use this varialble if you are using an installation script
$step = $_GET['step'];
if (!$step) {
	$page_title = 'Form';
}
else{
	$page_title = 'Test MySQL step '.$step;
}
############## BEGIN FUNCTIONS ##############################
# FUNCTION TO TEST USERNAME AND PASSWORD IN MYSQL HOST
function db_connect($server, $username, $password, $link = 'db_link') {
	global $$link, $db_error;
	$db_error = false;
	if (!$server) {
		$db_error = 'No Server selected.';
		return false;
	}
	$$link = @mysql_connect($server, $username, $password) or $db_error = mysql_error();
	return $$link;
}
# FUNCTION TO SELECT DATABASE ACCESS
function db_select_db($database) {
	echo mysql_error();
	return mysql_select_db($database);
}
# FUNCTION TO TEST DATABASE ACCESS
function db_test_create_db_permission($database) {
	global $db_error;
	$db_created = false;
	$db_error = false;
	if (!$database) {
		$db_error = 'No Database selected.';
		return false;
	}
	if ($db_error) {
		return false;
	} else {
		if (!@db_select_db($database)) {
			$db_error = mysql_error();
			return false;
		}else {
			return true;
		}
	return true;
	}
}

function step1 ($error) {
	echo '<h1 style="color:#FF0000">'.$error.'</h1><hr>';
?>
<form name="form1" method="post" action="<?php $_SERVER['PHP_SELF']; ?>?step=2">
<table border="0" cellspacing="5" cellpadding="5">
<tr>
<td><div align="right">mysql hostname:</div></td>
<td><input name="server" type="text" value="<?php echo $_REQUEST['server']; ?>"> 
(usually &quot;localhost&quot; or enter IP Address of MySQL Server)</td>
</tr>
<tr>
<td><div align="right">mysql username:</div></td>
<td><input type="text" name="username" value="<?php echo $_REQUEST['username']; ?>"></td>
</tr>
<tr>
<td><div align="right">mysql username password:</div></td>
<td><input type="text" name="password" value="<?php echo $_REQUEST['password']; ?>"></td>
</tr>
<tr>
<td><div align="right">mysql database name:</div></td>
<td><input type="text" name="database" value="<?php echo $_REQUEST['database']; ?>"></td>
</tr>
<tr>
<td colspan="2"><input type="submit" name="Submit" value="Submit"></td>
</tr>
</table>
</form>
<?php
}
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Webune MYSQL TEST - <?php echo $page_title; ?></title>
</head>
<body>
<h1><?php echo $page_title; ?></h1>
<?php
############## END FUNCTIONS ##############################
switch ($step) {
	case '2':
		if ($_REQUEST['server']) {
				$db = array();
				$db['DB_SERVER'] = trim(stripslashes($_REQUEST['server']));
				$db['DB_SERVER_USERNAME'] = trim(stripslashes($_REQUEST['username']));
				$db['DB_SERVER_PASSWORD'] = trim(stripslashes($_REQUEST['password']));
				$db['DB_DATABASE'] = trim(stripslashes($_REQUEST['database']));
				$db_error = false;
				db_connect($db['DB_SERVER'], $db['DB_SERVER_USERNAME'], $db['DB_SERVER_PASSWORD']);
				if ($db_error == false) {
					if (!db_test_create_db_permission($db['DB_DATABASE'])) {
						$error = $db_error;
					}
				} else {
					$error = $db_error;
				}
				if ($db_error != false) {
					$error = "failed";
					echo step1($db_error);
				} else {
					echo '<h1 style="color:green">Congratulations!</h1>
					Connected Successfuly to datbase <strong>
					<a href="http://www.webune.com/forums/how-to-test-mysql-database-connection.html">Continue &gt;&gt; </a></strong>';
				}
		} else {
			$error = "ERROR: please provide a hostanme";
			echo step1($error);
		}
	break;

	default:
	echo step1('Step 1');
	break;
}
?>
<div align="center">
<img src="http://www.webune.com/images/headers/default_logo.jpg">
</div>
<div align="center">
Script Courtesy of 
<a href="http://www.webune.com">Webune PHP/Mysql Hosting</a></div>
</body>
</html>

2. save the file as testmysql.php and upload to your website. NOTE: you must have php and mysql for this sample script to work

3. now open testmysql.php with your browser ( http://www.example.com/testmysql.php ), you will see if it fails or if it is able to connect successfuly

hope this helps

UPDATE: 12/19/2012 Thanks for your comments. I see that some of you have had trouble with the code. I have tested it again and it works ok on my apache server using XAMPP on my windows 7 laptop. So I created a short video to show you as proof that it works.

msuding Wed Mar 21, 2012

There are 2 small non-critical spelling mistakes in the code on line 115
"Connected Successfuly to datbase"
second "l" needed in "successfully" and "a" missing in "database"

hostman Wed Dec 19, 2012

Thanks, Sorry about my bad spelling. I have Corrected

From:
Connected Successfuly to datbase

To:Connected Successfully to database

Scott Tue Feb 07, 2012

Great post. Here’s a tool that lets you build your online database in minutes, without coding casp

Max Wed Jan 25, 2012

excellent. work like charm.

binaryman Sat Oct 08, 2011

Thank you, I have been trying to figure this out for a bit while manually setting up Apache, php, MySQL and now moving on to phpMyAdmin
does anyone have a good newbie reference for a home web-server phpMyAdmin guide?

Nixon Sat Oct 01, 2011

Very usefull! Thank you!

anonymous Sun Sep 04, 2011

no so simple...

Colin Tue May 31, 2011

Very handy - it helped me a lot, thanks!

Mon May 16, 2011

Oh great tutorial!!! It’s help me a lot.
Also php-example helps me to learn PHP, MySQL & CakePHP with ready made code examples.

Kelly
Web Developer, University of Technology, Sydney, Australia

wallpaperama Sun Feb 27, 2011

you probably are getting an error, but you may have display_errors = Off

make sure you can display php errors, otherwise, you will never know if your scripts fails or not

James Sun Feb 27, 2011

Ok, I've run the script, and I get to the second page.

It says "Test MySQL step 2" and nothing else.

I imagine it's supposed to say something like Congrats you've connected! or something like that.

How do I go about rectifying this situation?

Bala Mon Nov 08, 2010

Hi its working properly...
Nice article....
Its very useful who are learning PHP Basic...
Please post like this type of article...

Thom Thu Sep 30, 2010

I get step 2 message not congratulations, how can I fix this?
PHP not working with mysql but mysql works and other php scripts work.

victor Sun Aug 08, 2010

smart a good script to study and easy to get, kp it up,cheerz!

mihajlo Wed Apr 28, 2010

tnx 4 the code/script
i hope it will be some help

bobv Tue Dec 22, 2009

it's cool! i was looking for sqlite but what i saw is mysql. i was getting impatient with my problem with mysql so i wss trying to migrate to sqlite. anyway, my connection to mysql according to this website is okay. so, i figured out why i cannot connect. so what i did was changed "localhost" to "127.0.0.1" and it worked! what's the difference between the two?

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Forums »
MySQL Forums And Topics Discussions About Open Source Database »
Simple Php Mysql Connection Test Script Example

Title: Simple Php Mysql Connection Test Script Example

Description: this page shows you how you can test your MySQL database using a simple script using PHP and HTML. also shows a video with step by step

Tags: simple ,php ,mysql ,connection ,test ,script ,example

Info: This Post Has Been Viewed 0 Times Since
Date: Tue Feb 05, 2008
Author hostman Received 29 Replies #886

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Simple Php Mysql Connection Test Script Example

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