php SQL Server mssql_select_db error

Question

Up until yesterday I have been happily connecting to SQL Server Express 2005 using PHP 5 on IIS 7.

Yesterday I started getting errors when selecting a database.

<?php
$link = mssql_connect('localhost,1433', 'login', 'password');

if(!$link) {
    die('could not connect to MSSQL');
}

 if(!mssql_select_db('database', $link)) {
    echo mssql_get_last_message();
    die('could not select db');    
}    
?>

This outputs the following:

"Changed database context to 'database'.could not select db"

So mssql_get_last_message is outputting Changed database context to 'database'. which seems all correct and isn't really an error message. But then the mssql_select_db is still failing.

I have tested the following:

• The login is correct (you get a different error changing the username or password)
• The database exists (you get a different error if I use the name of a database that doesn't exist
• The login can connect to the database (you get a different error if you delete the database user in SQL Server)

I'm not sure what else to test.

Answer 1

Thanks to Martin and Phil for their responses. I created a new login and a new corresponding user which fixed the problem.