<?php
function wol($broadcast, $mac)
{
    $mac_array = split(':', $mac);

    $hwaddr = '';

    foreach($mac_array AS $octet)
    {
        $hwaddr .= chr(hexdec($octet));
    }

    // Create Magic Packet

    $packet = '';
    for ($i = 1; $i <= 6; $i++)
    {
        $packet .= chr(255);
    }

    for ($i = 1; $i <= 16; $i++)
    {
        $packet .= $hwaddr;
    }

    $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
    if ($sock)
    {
        $options = socket_set_option($sock, 1, 6, true);

        if ($options >=0) 
        {    
            $e = socket_sendto($sock, $packet, strlen($packet), 0, $broadcast, 7);
            socket_close($sock);
        }    
    }
}

wol('192.168.0.255', '12:34:56:78:90:ab');
?>
ok