[function.require-once]: failed to open stream: No such file or directory php

I get the following error when I go to http://zyz.com/abc/index.php:

Warning: require_once(C:\Inetpub\vhosts\xyz.com\httpdocs\abc\classes/mysqli.cls.inc) [function.require-once]: failed to open stream: No such file or directory in C:\Inetpub\vhosts\xyz.com\httpdocs\abc\classes\_ClassLoader.inc on line 5

开发者_JS百科below is the class loader.inc file

    <?php

function __autoload($clsname) {
    $ClassDir = dirname( __FILE__ ) . "/";
    require_once $ClassDir . strtolower( $clsname ) . '.cls.inc';
}

?>

You don't have mysqli installed, but are trying to use it. Your __autoload function tries to load it from the directory of the web application, but that's not where it would be located if it was installed. Install and configure mysqli to fix the problem. You can check whether it is installed by writing phpinfo(); in any .php file.

Do you have file mysqli.cls.inc at C:\Inetpub\vhosts\xyz.com\httpdocs\abc\classes folder? Check exact name