复制代码 代码如下:
<?php
define('IE', 1);
define('FIREFOX', 2);
define('CHROME', 3);
define('OPERA', 4);
class UserAgentDetect
{
static $version = array();

static $userAgent = '';

static function getUserAgent()
{
$header = getallheaders();
self :: $userAgent = $header['User-Agent'];
}
function findUserAgentByKey($ua, $key)
{
$len = strlen($key);
$start = strpos($ua, $key);

$pos = strpos($ua, ' ', $start + $len + 1);

return substr($ua, $start + $len, $pos - $len - $start);
}
static function detectUserAgent()
{
self :: getUserAgent();

if (strpos(self :: $userAgent, 'MSIE') != null)
{
self :: $version[] = IE;
self :: $version[] =self:: findUserAgentByKey(self :: $userAgent, 'MSIE');
}
else if (strpos(self :: $userAgent, 'Gecko/') != null)
{

self :: $version[] = FIREFOX;
self :: $version[] =self:: findUserAgentByKey(self :: $userAgent, 'Firefox/');
}
else if (strpos(self :: $userAgent, 'AppleWebKit/') != null)
{
self :: $version[] = CHROME;
self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Chrome/');
}
else if (strpos(self :: $userAgent, 'Presto/') != null)
{
self :: $version[] = OPERA;
self :: $version[] = self:: findUserAgentByKey(self :: $userAgent, 'Opera/');
}
else
{
}

return self :: $version;
}

function matchUserAgent($ua, $key)
{
preg_match("/$key.([^\s]*?)\s/", $ua, $out);

return $out[1];
}
}
$ua=UserAgentDetect::detectUserAgent();

print_r($ua);