IP范围匹配

ipMatch.php

<?php
function ipMatch($network, $ip) 
{
    $network=trim($network);
    $orig_network = $network;
    $ip = trim($ip);
    if ($ip == $network) {
        echo "used network ($network) for ($ip)\n";
        return TRUE;
    }
    $network = str_replace(' ', '', $network);
    if (strpos($network, '*') !== FALSE) {
        if (strpos($network, '/') !== FALSE) {
            $asParts = explode('/', $network);
            $network = @ $asParts[0];
        }
        $nCount = substr_count($network, '*');
        $network = str_replace('*', '0', $network);
        if ($nCount == 1) {
            $network .= '/24';
        } else if ($nCount == 2) {
            $network .= '/16';
        } else if ($nCount == 3) {
            $network .= '/8';
        } else if ($nCount > 3) {
            return TRUE; // if *.*.*.*, then all, so matched
        }
    }

    echo "from original network($orig_network), used network ($network) for ($ip)\n";

    $d = strpos($network, '-');
    if ($d === FALSE) {
        $ip_arr = explode('/', $network);
        if (!preg_match("@\d*\.\d*\.\d*\.\d*@", $ip_arr[0], $matches)){
            $ip_arr[0].=".0";    // Alternate form 194.1.4/24
        }
        $network_long = ip2long($ip_arr[0]);
        $x = ip2long($ip_arr[1]);
        $mask = long2ip($x) == $ip_arr[1] ? $x : (0xffffffff << (32 - $ip_arr[1]));
        $ip_long = ip2long($ip);
        return ($ip_long & $mask) == ($network_long & $mask);
    } else {
        $from = trim(ip2long(substr($network, 0, $d)));
        $to = trim(ip2long(substr($network, $d+1)));
        $ip = ip2long($ip);
        return ($ip>=$from and $ip<=$to);
    }
}