php记录百度等搜索引擎蜘蛛的来访记录

<?php
function is_robot()
{
	$useragent = strtolower($_SERVER['HTTP_USER_AGENT']);
	if (strpos($useragent, 'googlebot') !== false) {
		return 'Google';
	}
	if (strpos($useragent, 'baiduspider') !== false) {
		return 'Baidu';
	}
	if (strpos($useragent, 'msnbot') !== false) {
		return 'Bing';
	}
	if (strpos($useragent, 'slurp') !== false) {
		return 'Yahoo';
	}
	if (strpos($useragent, 'sosospider') !== false) {
		return 'Soso';
	}
	if (strpos($useragent, 'sogou spider') !== false) {
		return 'Sogou';
	}
	if (strpos($useragent, 'yodaobot') !== false) {
		return 'Yodao';
	}
	return false;
}
$searchbot = is_robot();
if ($searchbot) {
	$url = "http://".$_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
	$tlc_thispage = addslashes($_SERVER['HTTP_USER_AGENT']);
	$file = "./robot-logs-".date('Y-m-d').".txt";
	$time = date("Y-m-d G:i:s");
	$robotlog = " Time: $time \n Robot: $searchbot \n Spider: $tlc_thispage \n CurrentUrl: $url \n-------------------------------------------------\n\n";
	file_put_contents($file, $robotlog, FILE_APPEND);
}
?>

　　

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