test_preg_match
123456789101112131415
<?php
//从URL中获取主机名称
preg_match('@^(?:http://)?([^/]+)@i',
"http://www.php.net/index.html", $matches);
$host = $matches[1];
//获取主机名称的后面两部分
preg_match('/[^.]+\.[^.]+$/', $host, $matches);
echo "domain name is: {$matches[0]}\n";
?>
Php
INFO