(PHP 4, PHP 5)
Finds whether the given variable is a resource.
var
The variable being evaluated.
Returns TRUE if var is a resource, FALSE otherwise.
Example 1. is_resource() example
<?php$db_link = @mysql_connect('localhost', 'mysql_user', 'mysql_pass');if (!is_resource($db_link)) { die('Can\'t connect : ' . mysql_error());}?>