PHP游览器判定

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php判断游览器函数

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function getBrowerInfo()
{
    $u_agent = $_SERVER['HTTP_USER_AGENT'];
    $bname = 'Unknown';
    $platform = 'Unknown';
    $version = "";

    //First get the platform?
    if (preg_match('/linux/i', $u_agent)) {
        $platform = 'linux';
    } elseif (preg_match('/macintosh|mac os x/i', $u_agent)) {
        $platform = 'mac';
    } elseif (preg_match('/windows|win32/i', $u_agent)) {
        $platform = 'windows';
    }

    // Next get the name of the useragent yes seperately and for good reason
    if (preg_match('/MSIE/i', $u_agent) && !preg_match('/Opera/i', $u_agent)) {
        $bname = 'Internet Explorer';
        $ub = "MSIE";
    } elseif (preg_match('/Firefox/i', $u_agent)) {
        $bname = 'Mozilla Firefox';
        $ub = "Firefox";
    } elseif (preg_match('/OPR/i', $u_agent)) {
        $bname = 'Opera';
        $ub = "Opera";
    } elseif (preg_match('/Chrome/i', $u_agent) && !preg_match('/Edge/i', $u_agent)) {
        $bname = 'Google Chrome';
        $ub = "Chrome";
    } elseif (preg_match('/Safari/i', $u_agent) && !preg_match('/Edge/i', $u_agent)) {
        $bname = 'Apple Safari';
        $ub = "Safari";
    } elseif (preg_match('/Netscape/i', $u_agent)) {
        $bname = 'Netscape';
        $ub = "Netscape";
    } elseif (preg_match('/Edge/i', $u_agent)) {
        $bname = 'Edge';
        $ub = "Edge";
    } elseif (preg_match('/Trident/i', $u_agent)) {
        $bname = 'Internet Explorer';
        $ub = "MSIE";
    }

    // finally get the correct version number
    $known = array('Version', $ub, 'other');
    $pattern = '#(?<browser>' . join('|', $known) .
        ')[/ ]+(?<version>[0-9.|a-zA-Z.]*)#';
    if (!preg_match_all($pattern, $u_agent, $matches)) {
        // we have no matching number just continue
    }
    // see how many we have
    $i = count($matches['browser']);
    if ($i != 1) {
        //we will have two since we are not using 'other' argument yet
        //see if version is before or after the name
        if (strripos($u_agent, "Version") < strripos($u_agent, $ub)) {
            $version = $matches['version'][0];
        } else {
            $version = $matches['version'][1];
        }
    } else {
        $version = $matches['version'][0];
    }

    // check if we have a number
    if ($version == null || $version == "") {$version = "?";}

    return array(
        'userAgent' => $u_agent,
        'name' => $bname,
        'version' => $version,
        'platform' => $platform,
        'pattern' => $pattern,
    );
}

$browser = getBrowerInfo();