搜索引擎蜘蛛捕捉器(PHP)

实现蜘蛛捕捉的PHP代码如下：

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function get_naps_bot()
{
$useragent = strtolower ( $_SERVER [ ' HTTP_USER_AGENT ' ]);

if ( strpos ( $useragent , ' googlebot ' ) !== false ){
return ' Googlebot ' ;
}

if ( strpos ( $useragent , ' msnbot ' ) !== false ){
return ' MSNbot ' ;
}

if ( strpos ( $useragent , ' slurp ' ) !== false ){
return ' Yahoobot ' ;
}

if ( strpos ( $useragent , ' baiduspider ' ) !== false ){
return ' Baiduspider ' ;
}

if ( strpos ( $useragent , ' sohu-search ' ) !== false ){
return ' Sohubot ' ;
}

if ( strpos ( $useragent , ' lycos ' ) !== false ){
return ' Lycos ' ;
}

if ( strpos ( $useragent , ' robozilla ' ) !== false ){
return ' Robozilla ' ;
}
return false ;
}


function nowtime(){
$date = date ( " Y-m-d.G:i:s " );
return $date ;
}

$searchbot = get_naps_bot();

if ( $searchbot ){
$tlc_thispage = addslashes ( $_SERVER [ ' HTTP_USER_AGENT ' ]);
$url = $_SERVER [ ' HTTP_REFERER ' ];
$file = " robotlog.txt " ;
$time = nowtime();
$data = fopen ( $file , " a " );
fwrite ( $data , " Time:$timerobot:$searchbotURL:$tlc_thispage " );
fclose ( $data );
}