Hello friends, can someone help me?

I installed Arrow Trader in my server, but I having problems installing the code in my wordpress website:

If your website is called index.php, use the following code instead:
PHP Code: 
<?php virtual ("/cgi-bin/atc/in.cgi"); ?>
I inserted the code line above in the header.php file:
PHP Code: 
<?php virtual ("/cgi-bin/atc/in.cgi"); ?>
    </head>
    <body>
        <div class="wrapper">
        <div class="header">
But Im getting this error:
Fatal error: Call to undefined function virtual() in /home/myusername/public_html/wp-content/themes/mytheme/header.php on line 75
What I am doing wrong? Thank you!
Divvy Reviewed by Divvy on . Help me installing Arrow Trader in Wordpress Hello friends, can someone help me? I installed Arrow Trader in my server, but I having problems installing the code in my wordpress website: I inserted the code line above in the header.php file: <?php virtual ("/cgi-bin/atc/in.cgi"); ?> </head> <body> Rating: 5