php判断是不是搜索引擎蜘蛛/php判断是否手机访问的方法

php判断是否搜索引擎蜘蛛:

function getrobot() {
	if(!defined('IS_ROBOT')) {
		$kw_spiders = 'Bot|Crawl|Spider|slurp|sohu-search|lycos|robozilla';
		$kw_browsers = 'MSIE|Netscape|Opera|Konqueror|Mozilla';
		if(!strexists($_SERVER['HTTP_USER_AGENT'], 'http://') && preg_match("/($kw_browsers)/i", $_SERVER['HTTP_USER_AGENT'])) {
			define('IS_ROBOT', FALSE);
		} elseif(preg_match("/($kw_spiders)/i", $_SERVER['HTTP_USER_AGENT'])) {
			define('IS_ROBOT', TRUE);
		} else {
			define('IS_ROBOT', FALSE);
		}
	}
	return IS_ROBOT;
}

此函数来源于dz论坛程序. IS_ROBOT 被定义为一个常量.

IS_ROBOT?:'你是搜索引擎蜘蛛吧':'你是人';

php判断是否手机访问:

$ua = strtolower($_SERVER['HTTP_USER_AGENT']);

$uachar = "/(nokia|sony|ericsson|mot|samsung|sgh|lg|philips|panasonic|alcatel|lenovo|cldc|midp|mobile|wap)/i";

if(($ua == '' || preg_match($uachar, $ua))&& !strpos(strtolower($_SERVER['REQUEST_URI']),'wap'))
{
    $Loaction = 'wap/';

    if (!empty($Loaction))
    {
        ecs_header("Location: $Loaction\n");

        exit;
    }

}

来自ecshop的代码.

function strexists($string, $find) {
	return !(strpos($string, $find) === FALSE);
}