PHP 限制访问-支持多ip-通配符-IP段

/** * HOST访问限制 支持 IP(单IP,多IP,*通配符,IP段) 域名(单域名,多域名,*通配符) * 根据判断实现IP地址 白名单黑名单 * Author：70(qq781787584) * @param unknown $host 当前host 127.0.0.2 * @param unknown $list 允许的host列表 127.0.0.*,192.168.1.1,192.168.1.70,127.1.1.33-127.1.1.100 * @return boolean */function in_host($host, $list) { $list = ',' . $list . ','; $is_in = false; // 1.判断最简单的情况 $is_in = strpos ( $list, ',' . $host . ',' ) === false ? false : true; // 2.判断通配符情况 if (! $is_in && strpos ( $list, '*' ) !== false) { $hosts = array (); $hosts = explode ( '.', $host ); // 组装每个 * 通配符的情况 foreach ( $hosts as $k1 => $v1 ) { $host_now = ''; foreach ( $hosts as $k2 => $v2 ) { $host_now .= ($k2 == $k1 ? '*' : $v2) . '.'; } // 组装好后进行判断 if (strpos ( $list, ',' . substr ( $host_now, 0, - 1 ) . ',' ) !== false) { $is_in = true; break; } } } // 3.判断IP段限制 if (! $is_in && strpos ( $list, '-' ) !== false) { $lists = explode ( ',', trim ( $list, ',' ) ); $host_long = ip2long ( $host ); foreach ( $lists as $k => $v ) { if (strpos ( $v, '-' ) !== false) { list ( $host1, $host2 ) = explode ( '-', $v ); if ($host_long >= ip2long ( $host1 ) && $host_long <= ip2long ( $host2 )) { $is_in = true; break; } } } } return $is_in;}