How can one modify a PHP script to include multiple broadcast addresses for waking up machines in different subnets?

To include multiple broadcast addresses for waking up machines in different subnets, you can modify the PHP script to iterate through an array of broadcast addresses and send the Wake-on-LAN packets to each address. This way, you can wake up machines in different subnets by specifying their respective broadcast addresses in the array. 

<?php

// Array of broadcast addresses for different subnets
$broadcastAddresses = array(
    '192.168.1.255',
    '192.168.2.255',
    '192.168.3.255'
);

// MAC address of the machine to wake up
$macAddress = '00:11:22:33:44:55';

// Iterate through each broadcast address and send Wake-on-LAN packet
foreach ($broadcastAddresses as $broadcastAddress) {
    $macHex = str_replace(':', '', $macAddress);
    $macBinary = pack('H12', $macHex);
    $magicPacket = str_repeat(chr(0xFF), 6) . str_repeat($macBinary, 16);

    $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
    socket_set_option($socket, SOL_SOCKET, SO_BROADCAST, 1);
    socket_sendto($socket, $magicPacket, strlen($magicPacket), 0, $broadcastAddress, 7);
    socket_close($socket);

    echo "Wake-on-LAN packet sent to $broadcastAddress for MAC address $macAddress\n";
}
?>

Keywords

PHP script broadcast addresses multiple subnets waking up machines modification

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