Why can't I connect to my mssql database using PHP?

Question

I've done so much research trying to get my PHP code hosted on IIS to connect to my MSSQL database. I just can't seem to figure out the issue. Has anyone come across this before?

<?php

$serverName = 'AEGIS-PC\SQLEXPRESS';
$connectionInfo=array('Database'=>'tttb_db');

$con = sqlsrv_connect($serverName, $connectionInfo);
if($con){
    echo 'Connection established<br />';
}
else {
    echo 'Connection failed<br />';
    die(print_r(sqlsrv_errors(), TRUE));
}

?>

Update, we have a new error:

Connection failed Array ( [0] => Array ( [0] => 28000 [SQLSTATE] => 28000 [1] => 18456 [code] => 18456 [2] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Login failed for user 'NT AUTHORITY\IUSR'. [message] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Login failed for user 'NT AUTHORITY\IUSR'. ) [1] => Array ( [0] => 42000 [SQLSTATE] => 42000 [1] => 4060 [code] => 4060 [2] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Cannot open database "tttb_db" requested by the login. The login failed. [message] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Cannot open database "tttb_db" requested by the login. The login failed. ) [2] => Array ( [0] => 28000 [SQLSTATE] => 28000 [1] => 18456 [code] => 18456 [2] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Login failed for user 'NT AUTHORITY\IUSR'. [message] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Login failed for user 'NT AUTHORITY\IUSR'. ) [3] => Array ( [0] => 42000 [SQLSTATE] => 42000 [1] => 4060 [code] => 4060 [2] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Cannot open database "tttb_db" requested by the login. The login failed. [message] => [Microsoft][ODBC Driver 11 for SQL Server][SQL Server]Cannot open database "tttb_db" requested by the login. The login failed. ) )

Our SQL server is using Windows Authentication and our server name is AEGIS-PC\SQLEXPRESS with the user name and password blocks are greyed out. I can not think of reason our login would be failing. What are we doing wrong?

Can you prove that your IIS server is running the code as PHP at all? Try creating a page that has only <?php phpinfo(); ?> and make sure the info screen is being displayed. — PaulProgrammer
Have you checked PHP is working on your machine, and that you have the necessary PHP extensions to connect to SQL Server? What version of PHP are you running? Do a phpinfo(); in your code to have a look at extensions. — halfer
I have installed PHP. I can get simple variables to display on the screen so I know IIS is running PHP. The script seems to break when it gets to the database portion. — Benschneider06

René Höhle René Höhle · Accepted Answer · 2015-04-15T12:55:23

There are a few things that could cause such problems:

1.) Your modules aren't loaded because its VC9 instead if VC11. Check which compiler version your system use and install the correct driver.

2.) Check your PHP Version and use the correct driver for your PHP-Version your can check that in your phpinfo().

3.) Don't forget to install the MSSQL Native Client otherwise you can't connect to your database that is the problem what I have every time.

Your code looks good and if your get the error message that sqlsrv_connect isn't found that is a signal that the module is not loaded.

https://www.microsoft.com/en-us/download/details.aspx?id=20098

Why can't I connect to my mssql database using PHP?

3 Answers