Are there any best practices for sending Magic Packets using PHP and fsockopen?

Sending Magic Packets using PHP and fsockopen requires constructing a specific UDP packet with the target device's MAC address and sending it to the broadcast address of the network. To do this, you can use the following PHP code snippet which creates a Magic Packet and sends it using fsockopen. 

<?php

function sendMagicPacket($macAddress, $broadcastAddress, $port = 9) {
    $macHex = str_replace(':', '', $macAddress);
    $macBin = pack('H12', $macHex);
    
    $packet = str_repeat(chr(0xFF), 6) . str_repeat($macBin, 16);
    
    $socket = fsockopen('udp://' . $broadcastAddress, $port, $errno, $errstr, 2);
    
    if ($socket) {
        fwrite($socket, $packet);
        fclose($socket);
        return true;
    } else {
        return false;
    }
}

$macAddress = '00:11:22:33:44:55';
$broadcastAddress = '255.255.255.255';

if (sendMagicPacket($macAddress, $broadcastAddress)) {
    echo 'Magic Packet sent successfully!';
} else {
    echo 'Failed to send Magic Packet.';
}
?>

Keywords

Magic Packets PHP fsockopen network programming Wake-on-LAN

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