mysql_connect() fails with empty warning

Question

I'm in the process of setting up PHP / MYSQL on a Windows Server 2003 machine, with IIS. I have installed PHP 5.3.8 and MySQL 5.5. PHP is configured to use FastCGI.

In php.ini I have the following lines uncommented:

extension=php_mysql.dll

extension=php_mysqli.dll

Here is my code:

<?php
$con = mysql_connect("127.0.0.1","root","test");
if (!$con)
  {
  die('Could not connect: $php_errormsg' . mysql_errno() . ": " . mysql_error(). "\n");
  }
echo "connected"; 
?>

Here is the output:

PHP Warning: mysql_connect(): in C:\\Inetpub\\wwwroot\\mysqltest.php on line 2

I can connect to the MYSQL database on this server from a PHP page running on another webserver - so I know that my MYSQL database is correctly accepting connections.

Any help on this would be greatly appreciated

Answer 1

要查看连接错误，可以打印mysql_error的输出。

$con = mysql_connect("localhost","root","test") or die('cannot connect : '. mysql_error());

Answer 2

Apparently I had a permissions issue. I was able to resolve it by following these steps:

From Windows Explorer, I...

• right-clicked on C:\\Inetpub
• went to Properties > Security > Permissions
• selected "Replace permission entries on all child objects with entries shown here that apply to child objects"
• clicked Apply
• restarted IIS by running iisreset from a command prompt.