What are the potential requirements and limitations for implementing the Wake on Lan script on a server?

To implement Wake on Lan on a server, you will need to ensure that the server's network adapter supports Wake on Lan and that the BIOS settings are configured correctly. Additionally, you may need to open the necessary ports on the server's firewall to allow Wake on Lan packets to be received. Limitations may include the need for the server to be connected to a wired network and potential security concerns with enabling Wake on Lan functionality. 

// PHP code snippet to send a Wake on Lan packet to a server
function wakeOnLan($macAddress, $broadcastAddress) {
    $macHex = str_replace(':', '', $macAddress);
    $macBinary = pack('H12', $macHex);
    
    $magicPacket = str_repeat(chr(255), 6) . str_repeat($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);
}

// Usage
wakeOnLan('00:11:22:33:44:55', '255.255.255.255');

Keywords

Wake on Lan server requirements limitations implementation

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