代码如下： 

function checkmobile() {
	global $_G;
	$mobile = array();
	static $touchbrowser_list =array('iphone', 'android', 'phone', 'mobile', 'wap', 'netfront', 'java', 'opera mobi', 'opera mini',
				'ucweb', 'windows ce', 'symbian', 'series', 'webos', 'sony', 'blackberry', 'dopod', 'nokia', 'samsung',
				'palmsource', 'xda', 'pieplus', 'meizu', 'midp', 'cldc', 'motorola', 'foma', 'docomo', 'up.browser',
				'up.link', 'blazer', 'helio', 'hosin', 'huawei', 'novarra', 'coolpad', 'webos', 'techfaith', 'palmsource',
				'alcatel', 'amoi', 'ktouch', 'nexian', 'ericsson', 'philips', 'sagem', 'wellcom', 'bunjalloo', 'maui', 'smartphone',
				'iemobile', 'spice', 'bird', 'zte-', 'longcos', 'pantech', 'gionee', 'portalmmm', 'jig browser', 'hiptop',
				'benq', 'haier', '^lct', '320x320', '240x320', '176x220', 'windows phone');
	static $wmlbrowser_list = array('cect', 'compal', 'ctl', 'lg', 'nec', 'tcl', 'alcatel', 'ericsson', 'bird', 'daxian', 'dbtel', 'eastcom',
			'pantech', 'dopod', 'philips', 'haier', 'konka', 'kejian', 'lenovo', 'benq', 'mot', 'soutec', 'nokia', 'sagem', 'sgh',
			'sed', 'capitel', 'panasonic', 'sonyericsson', 'sharp', 'amoi', 'panda', 'zte');

	static $pad_list = array('ipad');

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

	if(dstrpos($useragent, $pad_list)) {
		return false;
	}
	if(($v = dstrpos($useragent, $touchbrowser_list, true))){
		$_G['mobile'] = $v;
		return '2';
	}
	if(($v = dstrpos($useragent, $wmlbrowser_list))) {
		$_G['mobile'] = $v;
		return '3'; //wml版
	}
	$brower = array('mozilla', 'chrome', 'safari', 'opera', 'm3gate', 'winwap', 'openwave', 'myop');
	if(dstrpos($useragent, $brower)) return false;

	$_G['mobile'] = 'unknown';
	if(isset($_G['mobiletpl'][$_GET['mobile']])) {
		return true;
	} else {
		return false;
	}
}