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<?php
$agent = $_SERVER['HTTP_USER_AGENT'] ;
$agent = strtolower($agent);
if (strstr($agent, 'google')) $spider = 'google';
elseif (strstr($agent, 'baidu')) $spider = 'baidu';
elseif (strstr($agent, 'sogou')) $spider = 'sogou';
elseif (strstr($agent, 'yodao')) $spider = 'yodao';
elseif (strstr($agent, 'yahoo')) $spider = 'yahoo';
elseif (strstr($agent, 'soso')) $spider = 'soso';
elseif (strstr($agent, 'msnbot')) $spider = 'msn';
elseif (strstr($agent, '360')) $spider = '360';
elseif (strstr($agent, 'ia_archiver')) $spider = 'alexa';
else $spider = '';
?>