[PHP] generate random proxy IP:PORT from CIDR

this script will Generate a random IP:PORT address within a CIDR range.

<?php

/**
 * Generate a random IP address within a CIDR range.
 *
 * @param string $cidr The CIDR range (e.g., "192.168.1.0/24").
 * @return string The random IP address.
 */
function generateRandomIP(string $cidr): string {
    list($ip, $subnet) = explode('/', $cidr);
    
    // Convert IP to binary format
    $ipBinary = ip2long($ip);
    
    // Calculate the number of available IP addresses in the subnet
    $subnetSize = pow(2, (32 - $subnet));
    
    // Generate a random offset within the subnet
    $offset = mt_rand(1, $subnetSize - 2); // Exclude network address and broadcast address
    
    // Calculate the resulting IP
    $randomIP = long2ip($ipBinary + $offset);
    
    return $randomIP;
}

/**
 * Generate a random port number.
 *
 * @return int The random port number.
 */
function generateRandomPort(): int {
    return mt_rand(1024, 65535);
}

// Example CIDR range
$cidr = "192.168.1.0/24";

// Generate a random IP address within the CIDR range
$randomIP = generateRandomIP($cidr);

// Generate a random port number
$randomPort = generateRandomPort();

// Output the random IP:Port combination
echo "Random IP:Port: $randomIP:$randomPort\n";
?>