PHP utility functions for implementing black-and-white lists

This article has shared 2 PHP for the implementation of the black and white list of practical functions, respectively, the security IP detection function and get client IP function, the comments explained very clearly, here I do not much nonsense.

This is a PHP function to detect whether the IP is illegal, adapt to the whitelist, blacklist feature development, the main scenario applies to: API source restrictions, access restrictions and so on.

The code is as follows:

/** * Security IP detection, support IP segment detection * @param string $IP to detect IP * @param string|array $ips  Whitelist IP or blacklist IP * @return boolean true on white list or black list, otherwise not */function is_safe_ip ($ip = "", $ips = "") {     if (! $ip) $ip = Get_client_ip ();  Gets the client IP    if ($ips) {        if (is_string ($ips)) {//IP with "," for example, whitelist ip:192.168.1.13,123.23.23.44,193.134.*.*            $ips = Explode (",", $ips);        }    } else{//Read background configuration whitelist IP        $obj = new Setting ();        $ips = Explode (",", $obj->getconfig ("Whiteip"));      }    if (In_array ($ip, $ips)) {        return true;    }    $ipregexp = implode (' | ', Str_replace (Array (' * ', '. '), Array (' \d+ ', ' \ '), $ips));      $rs = Preg_match ("/^ (". $ipregexp. ") $/", $ip);      if ($RS) return true;    return;}

Get IP address, reference thinkphp built-in function here

The code is as follows:

At the request of users, posted get_client_ip () function/** * Get the client IP address * @param integer $type return type 0 returns the IP address 1 returns the IPV4 address number * @param Boolean $adv whether high    Level mode acquisition (possibly disguised) * @return mixed */function get_client_ip ($type = 0, $adv =false) {$type = $type? 1:0;    static $IP = NULL;    if ($ip!== NULL) return $ip [$type]; if ($ADV) {if (Isset ($_server[' http_x_forwarded_for ')) {$arr = explode (', ', $_server[' Http_x_forwa            Rded_for ']);            $pos = Array_search (' unknown ', $arr);            if (false!== $pos) unset ($arr [$pos]);        $ip = Trim ($arr [0]);        }elseif (Isset ($_server[' http_client_ip ')) {$ip = $_server[' http_client_ip '];        }elseif (Isset ($_server[' remote_addr ')) {$ip = $_server[' remote_addr '];    }}elseif (Isset ($_server[' remote_addr ')) {$ip = $_server[' remote_addr '];    }//IP address legal authentication $long = sprintf ("%u", Ip2long ($IP)); $ip = $long?   Array ($ip, $long): Array (' 0.0.0.0 ', 0); return $ip [$type];} 

Summary : The above is the entire content of this article, I hope to be able to help you learn.