php判断是否为移动端浏览器

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方法1: 简答的通过user-agent判断是否为手机访问

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<?php
function isMobile() {
  //判断手机发送的客户端标志
  if(isset($_SERVER['HTTP_USER_AGENT'])) {
    $userAgent = strtolower($_SERVER['HTTP_USER_AGENT']);
    $clientkeywords = array(
      'nokia', 'sony', 'ericsson', 'mot', 'samsung', 'htc', 'sgh', 'lg', 'sharp', 'sie-'
      ,'philips', 'panasonic', 'alcatel', 'lenovo', 'iphone', 'ipod', 'blackberry', 'meizu',
      'android', 'netfront', 'symbian', 'ucweb', 'windowsce', 'palm', 'operamini',
      'operamobi', 'opera mobi', 'openwave', 'nexusone', 'cldc', 'midp', 'wap', 'mobile'
    );
    // 从HTTP_USER_AGENT中查找手机浏览器的关键字
    if(preg_match("/(".implode('|',$clientkeywords).")/i",$userAgent)&&strpos($userAgent,'ipad') === false)
    {
      return true;
    }
  }
  return false;
}
?>

方法2

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<?php
function is_mobile()
{
    // 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($_SERVER['HTTP_VIA'], "wap") ? true : false;
    }
    // 脑残法，判断手机发送的客户端标志,兼容性有待提高
    if (isset ($_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',
            'mobi',
            'kindle',
            'opera mini',
            'opera',
            );
        // 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;
}
?>

方法3：下面是一个从PHP框架剥离的判断是否为手机移动终端的函数

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<?php
function is_mobile_request()
{
    $_SERVER['ALL_HTTP'] = isset($_SERVER['ALL_HTTP']) ? $_SERVER['ALL_HTTP'] : '';
    $mobile_browser = '0';
    if(preg_match('/(up.browser|up.link|mmp|symbian|smartphone|midp|wap|phone|iphone|ipad|ipod|android|xoom)/i', strtolower($_SERVER['HTTP_USER_AGENT'])))
        $mobile_browser++;
    if((isset($_SERVER['HTTP_ACCEPT'])) and (strpos(strtolower($_SERVER['HTTP_ACCEPT']),'application/vnd.wap.xhtml+xml') !== false))
        $mobile_browser++;
    if(isset($_SERVER['HTTP_X_WAP_PROFILE']))
        $mobile_browser++;
    if(isset($_SERVER['HTTP_PROFILE']))
        $mobile_browser++;
    $mobile_ua = strtolower(substr($_SERVER['HTTP_USER_AGENT'],0,4));
    $mobile_agents = array(
        'w3c ','acs-','alav','alca','amoi','audi','avan','benq','bird','blac',
        'blaz','brew','cell','cldc','cmd-','dang','doco','eric','hipt','inno',
        'ipaq','java','jigs','kddi','keji','leno','lg-c','lg-d','lg-g','lge-',
        'maui','maxo','midp','mits','mmef','mobi','mot-','moto','mwbp','nec-',
        'newt','noki','oper','palm','pana','pant','phil','play','port','prox',
        'qwap','sage','sams','sany','sch-','sec-','send','seri','sgh-','shar',
        'sie-','siem','smal','smar','sony','sph-','symb','t-mo','teli','tim-',
        'tosh','tsm-','upg1','upsi','vk-v','voda','wap-','wapa','wapi','wapp',
        'wapr','webc','winw','winw','xda','xda-'
    );
    if(in_array($mobile_ua, $mobile_agents))
        $mobile_browser++;
    if(strpos(strtolower($_SERVER['ALL_HTTP']), 'operamini') !== false)
        $mobile_browser++;
    if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows') !== false)
        $mobile_browser=0;
    if(strpos(strtolower($_SERVER['HTTP_USER_AGENT']), 'windows phone') !== false)
        $mobile_browser++;
    if($mobile_browser>0)
        return true;
    else
        return false;
}
?>