IpToCidr函数,该如何解决

function ip2cidr($ip_start,$ip_end) {<br />  if(long2ip(ip2long($ip_start))!=$ip_start or long2ip(ip2long($ip_end))!=$ip_end) return !trigger_error('ip 不合法', E_USER_NOTICE); <br />  $ipl_start = ip2long($ip_start);<br />  $ipl_end = ip2long($ip_end);<br />  if($ipl_start>0 && $ipl_end<0) $delta = ($ipl_end + 4294967296) - $ipl_start;<br />  else $delta = $ipl_end - $ipl_start;<br />  $netmask = sprintf('%032b', $delta);<br />  if(ip2long($ip_start)==0 && substr_count($netmask,"1")==32) return "0.0.0.0/0";<br />  if($delta<0 or ($delta>0 && $delta%2==0)) return !trigger_error("区间数量不合法 $delta", E_USER_NOTICE);<br />  for($mask=0; $mask<32; $mask++) if($netmask[$mask]==1) break;<br />  if(substr_count($netmask,"0")!=$mask) {<br />    $w = strrpos($netmask, '0') + 1;<br />    $m = pow(2, 32-$w) - 1;<br />    $ip_start = long2ip(($ipl_start & ~$m)+$m+1);<br />    return long2ip($ipl_start & ~$m) . "/$w," . ip2cidr($ip_start,$ip_end);<br />  };<br />  return "$ip_start/$mask";<br />} 

$r = ip2cidr("36.96.0.1","36.223.255.255");<br />print_r($r);<br /><br />function ip2cidr($ip_start,$ip_end) {<br />  $res = array();<br />  if(long2ip(ip2long($ip_start))!=$ip_start or long2ip(ip2long($ip_end))!=$ip_end)<br />    return !trigger_error('ip 不合法', E_USER_NOTICE); <br />  $ipl_start = ip2long($ip_start);<br />  if($ipl_start < 0) $ipl_start += 0x100000000;<br /><br />  $ipl_end = ip2long($ip_end);<br />  if($ipl_end<0) $ipl_end += 0x100000000;<br /><br />  $ipl=$ipl_start;<br />  do {<br />    $k = strrpos(sprintf('%032b', $ipl), '1');<br />    $cidr = $k + 1;<br />    $dk = pow(2, 32-$k-1);<br />    $mask = $dk - 1;<br />    $res[] = sprintf("%s/%d", long2ip($ipl & ~$mask), $cidr);<br />    $ipl += $dk;<br />  }while($ipl < $ipl_end);<br />  return $res;<br />} 

Array<br />(<br />    [0] => 36.96.0.1/32<br />    [1] => 36.96.0.2/31<br />    [2] => 36.96.0.4/30<br />    [3] => 36.96.0.8/29<br />    [4] => 36.96.0.16/28<br />    [5] => 36.96.0.32/27<br />    [6] => 36.96.0.64/26<br />    [7] => 36.96.0.128/25<br />    [8] => 36.96.1.0/24<br />    [9] => 36.96.2.0/23<br />    [10] => 36.96.4.0/22<br />    [11] => 36.96.8.0/21<br />    [12] => 36.96.16.0/20<br />    [13] => 36.96.32.0/19<br />    [14] => 36.96.64.0/18<br />    [15] => 36.96.128.0/17<br />    [16] => 36.97.0.0/16<br />    [17] => 36.98.0.0/15<br />    [18] => 36.100.0.0/14<br />    [19] => 36.104.0.0/13<br />    [20] => 36.112.0.0/12<br />    [21] => 36.128.0.0/9<br />)<br /><br />

$r = ip2cidr("36.96.0.0","36.223.255.255");<br />print_r($r);

Array<br />(<br />    [0] => 36.96.0.0/11<br />    [1] => 36.128.0.0/9<br />)<br /><br />

$r = ip2cidr("36.96.0.0","36.223.255.255");<br>print_r($r);<br><br>function ip2cidr($ip_start,$ip_end) {<br>  $res = array();<br>  if(long2ip(ip2long($ip_start))!=$ip_start or long2ip(ip2long($ip_end))!=$ip_end)<br>    return !trigger_error('ip 不合法', E_USER_NOTICE); <br>  $ipl_start = ip2long($ip_start);<br>  if($ipl_start <br>  $ipl_end = ip2long($ip_end);<div class="clear">
                 
              
              
        
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