这个代码片段可以方便你禁止某些特定的 IP 地址访问你的网站

if ( !file_exists('blocked_ips.txt') ) {   $deny_ips = array(    '127.0.0.1',    '192.168.1.1',    '83.76.27.9',    '192.168.1.163'   );  } else {   $deny_ips = file('blocked_ips.txt');  }  // read user ip adress:  $ip = isset($_SERVER['REMOTE_ADDR']) ? trim($_SERVER['REMOTE_ADDR']) : '';      // search current IP in $deny_ips array  if ( (array_search($ip, $deny_ips))!== FALSE ) {   // address is blocked:   echo 'Your IP adress ('.$ip.') was blocked!';   exit;  }