Access restrictions on IP and IP segments

Originally wrote a few functions, IP blacklist is recorded in the library, in order to facilitate understanding, changed to a class of IP blacklist written out.

192.168.1.1 Single IP
192.168.1.* acting like this 192.168.1.1-192.168.1-255
192.158.1.2-20 This is Representative 192.158.1.2-192.158.1.20
You can also write 192.168.1 like this. [1|2|3]

Hey ~ a method does not know whether the idea is comprehensive, take out the discussion

Use

The following is a reference fragment: $oBlock _ip = new Block_ip (); $oBlock _ip->checkip ();

The following is a reference fragment: <?php Class Block_ip { var $Block _ip = Array ("192.168.1.1", "210.10.2.1-20", "222.34.4.*"); function __construct () { } function __destruct () { } Private Function Makepregip ($STR) { if (Strstr ($str, "-")) { $aIP = Explode (".", $str); foreach ($aIP as $k => $v) { if (!strstr ($v, "-")) { $preg _limit. = Makepregip ($v); } else{ $aipNum = Explode ("-", $v); for ($i = $aipNum [0]; $i <= $aipNum [1]; $i + +) { $preg. = $preg? "|". $i: "[". $i; } $preg _limit =strrpos ($preg _limit, ".", 1) = = (strlen ($preg _limit)-1)? $preg. "]": ".". $preg. "]"; } } }else{ $preg _limit. = $str. "."; } return $preg _limit; } Private Function Getallblockip () { if ($this->block_ip) { foreach ($this->block_ip as $k => $v) { $ipaddres = $this->makepregip ($v->start_ip); $ip = Str_ireplace (".", "\.", $ipaddres); $ip = Str_replace ("*", "[0-9]{1,3}", $ip); $ipaddres = "/". $ip. " /"; $ip _list[] = $ipaddres; } } return $IP _list; } Public Function Checkip () { $iptable = $this->getallblockip (); $IsJoined = true; Get User IP $Ip = $this->get_client_ip (); $Ip = Trim ($Ip); Remove the IP section from the Blacklist if ($iptable) { foreach ($iptable as $value) { if (Preg_match ("{$value}", $Ip)) { $IsJoined = false; Break } } } If you do the following in the IP blacklist if (! $IsJoined) { echo "IP Error"; Exit } } Private Function Get_client_ip () { if (getenv ("Http_client_ip") && strcasecmp (getenv ("Http_client_ip"), "Unknown") $ip = getenv ("Http_client_ip"); else if (getenv ("Http_x_forwarded_for") && strcasecmp (getenv ("Http_x_forwarded_for"), "Unknown") $ip = getenv ("Http_x_forwarded_for"); else if (getenv ("REMOTE_ADDR") && strcasecmp (getenv ("REMOTE_ADDR"), "Unknown") $ip = getenv ("REMOTE_ADDR"); else if (isset ($_server[' remote_addr ']) && $_server[' remote_addr '] && strcasecmp ($_server[' Remote_ ADDR '], "unknown") $ip = $_server[' remote_addr ']; Else $ip = "Unknown"; return ($IP); } } ?>