PHP和JS判断访问客户端的是PC还是移动设备

js判断

<script type="text/javascript">
    function browserRedirect() {
	var sUserAgent = navigator.userAgent.toLowerCase();
	var bIsIpad = sUserAgent.match(/ipad/i) == "ipad";
	var bIsIphoneOs = sUserAgent.match(/iphone os/i) == "iphone os";
	var bIsMidp = sUserAgent.match(/midp/i) == "midp";
	var bIsUc7 = sUserAgent.match(/rv:1.2.3.4/i) == "rv:1.2.3.4";
	var bIsUc = sUserAgent.match(/ucweb/i) == "ucweb";
	var bIsAndroid = sUserAgent.match(/android/i) == "android";
	var bIsCE = sUserAgent.match(/windows ce/i) == "windows ce";
	var bIsWM = sUserAgent.match(/windows mobile/i) == "windows mobile";

	if (bIsIpad || bIsIphoneOs || bIsMidp || bIsUc7 || bIsUc || bIsAndroid || bIsCE || bIsWM) {
	    window.location.href = 'http://url/mobile.html';
	} else {
	    window.location = 'http://url/pc.html';
	}

    }

    browserRedirect();
</script>

 （上面js判断方法，个人测试了下，在windows phone8 上会判断为pc）

php判断

/**
 *判断是否是通过手机访问
 */
function isMobile() {
    // 如果有HTTP_X_WAP_PROFILE则一定是移动设备
    if (isset($_SERVER['HTTP_X_WAP_PROFILE'])) {
        return true;
    }
    //如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
    if (isset($_SERVER['HTTP_VIA'])) {
        //找不到为flase,否则为true
        return stristr($_SERVER['HTTP_VIA'], "wap") ? true : false;
    }
    //判断手机发送的客户端标志,兼容性有待提高
    if (isset($_SERVER['HTTP_USER_AGENT'])) {
        $clientkeywords = array('nokia', 'sony', 'ericsson', 'mot', 'samsung', 'htc', 'sgh', 'lg', 'sharp',
                'sie-', 'philips', 'panasonic', 'alcatel', 'lenovo', 'iphone', 'ipod', 'blackberry', 'meizu',
                'android', 'netfront', 'symbian', 'ucweb', 'windowsce', 'palm', 'operamini', 'operamobi',
                'openwave', 'nexusone', 'cldc', 'midp', 'wap', 'mobile');
        // 从HTTP_USER_AGENT中查找手机浏览器的关键字
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))) {
            return true;
        }
    }
    //协议法，因为有可能不准确，放到最后判断
    if (isset($_SERVER['HTTP_ACCEPT'])) {
        // 如果只支持wml并且不支持html那一定是移动设备
        // 如果支持wml和html但是wml在html之前则是移动设备
        if ((strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') !== false) && (strpos($_SERVER['HTTP_ACCEPT'], 'text/html') === false || (strpos($_SERVER['HTTP_ACCEPT'], 'vnd.wap.wml') < strpos($_SERVER['HTTP_ACCEPT'], 'text/html')))) {
            return true;
        }
    }
    return false;
}