<?php
$ips = array('192.168.1.1-192.168.1.254','192.168.0.1-192.168.0.254','192.168.3.1-192.168.3.254','192.168.4.1-192.168.4.254');
foreach ($ips as $ip) {
list($start, $end) = explode('-', $ip);
//去除32位下負數
$start = sprintf("%u", ip2long($start));
$end = sprintf("%u",ip2long($end));
$newips[] = array($start, $end);
}
function my_sort($a, $b) {
if ($a[0] == $b[0])
return 0;
return ($a[0] < $b[0]) ? -1 : 1;
}
//從大到小排序，IP段較多時可以使用2分查找或多分。
usort($newips, 'my_sort');
$matchip = '192.168.1.22';
$matchip = sprintf("%u",ip2long($matchip));
foreach ($newips as $value) {
if ($matchip > $value[0] && $matchip < $value[1])
echo "匹配IP段：". long2ip($value[0]) . '-' . long2ip($value[1]) . "\n";
}
CIDR方式匹配，具體代碼如下：
<?php
function cidr_match($ip, $range)
{
list ($subnet, $bits) = explode('/', $range);
$ip = ip2long($ip);
$subnet = ip2long($subnet);
$mask = -1 << (32 - $bits);
$subnet &= $mask;
return ($ip & $mask) == $subnet;
}
var_dump(cidr_match('192.168.1.22', '192.168.1.0/24'));
CIDR獲取IP段起始IP地址：
<?php
function cidrToRange($cidr) {
$range = array();
$cidr = explode('/', $cidr);
$range[0] = long2ip((ip2long($cidr[0])) & ((-1 << (32 - (int)$cidr[1]))));
$range[1] = long2ip((ip2long($cidr[0])) + pow(2, (32 - (int)$cidr[1])) - 1);
return $range;
}
var_dump(cidrToRange("192.168.1.1/24"));
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