将 ip 短符号转换为 CIDR 符号

Question

suppose I have a list like this below (in array $ips) which includes simple ip addresses and ip in short ip notation style.

125.45.
201.35.1.
35.89.18.27
101.135.2
222.122
78.56.21.146

how to convert them to ip Hyphenated range using php?

ie the result should be

125.45.0.0-125.45.255.255
201.35.1.0-201.35.1.255
35.89.18.27
101.135.2.0-101.135.2.255
222.122.0.0-222.122.255.255 
78.56.21.146

Answer 1

Note, that I did this as a fun experiment. Your question was a little vague, and you showed no attempt to actually to this yourself. That being said, this function should accomplish what you are wanting. Let me explain what it does:

First thing, checks if last character in the ip is a dot and removes it.

Second, count the number of ranges your IP has.

Third use a switch/case statement (cleaner than if elseif IMHO) to determine what to do with the string, based on IP range.

Lastly define the starting range and the ending range and concatenate them.

Finally return result.

<?php

$ips = array();


$ips[0] = '125.45.';
$ips[1] = '201.35.1.';
$ips[2] = '101.135.2';
$ips[3] = '222.122';
$ips[4] = '78.56.21.146';


foreach($ips as $ip){

echo "\n\nNEW IP RANGE: " . convert_ip($ip) . "\n\n";

}

function convert_ip($ip){

$ip = rtrim($ip, '.');

$ip_count = count( explode('.', $ip) );

switch ($ip_count) {

    case 1:

        $starting_ip = $ip . '.0.0.0';

        $ending_ip = $ip . '.255.255.255';

        $return_ip = "$starting_ip-$ending_ip";

        break;
    case 2:

        $starting_ip = $ip . '.0.0';

        $ending_ip = $ip . '.255.255';

        $return_ip = "$starting_ip-$ending_ip";

        break;
    case 3:

        $starting_ip = $ip . '.0';

        $ending_ip = $ip . '.255';

        $return_ip = "$starting_ip-$ending_ip";

        break;
    case 4:

        $return_ip = $ip;

        break;

    default:
        $return_ip = 'Unknown';
}

return $return_ip;

}

?>

NEW IP RANGE: 125.45.0.0-125.45.255.255

NEW IP RANGE: 201.35.1.0-201.35.1.255

NEW IP RANGE: 101.135.2.0-101.135.2.255

NEW IP RANGE: 222.122.0.0-222.122.255.255

NEW IP RANGE: 78.56.21.146