WordPress 实现自动记录死链地址（自动去重复）

//WordPress 实现自动记录死链地址（防重复）
if(is_404() && strpos($ua, 'Baiduspider')!== false
||strpos($ua, 'Sogou') !== false
||strpos($ua, 'YisouSpider') !== false
||strpos($ua, 'Bytespider') !== false
||strpos($ua, 'bingbot') !== false
||strpos($ua, '360Spider')!== false
||strpos($ua, 'Googlebot')!== false ){
$file = @file("deadlinks.txt");//deadlinks.txt
$check = true;
if(is_array($file) && !empty($file))
foreach($file as &$f){
if($f == home_url($_SERVER['REQUEST_URI'])."\n")
$check = false;
}
if($check){
$fp = fopen("deadlinks.txt","a");//deadlinks.txt 就是在网站根目录的记录死链的文件
flock ($fp, LOCK_EX) ;
fwrite ($fp, home_url($_SERVER['REQUEST_URI'])."\n");
flock ($fp, LOCK_UN);
fclose ($fp);
}
}