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PHP实现wol

2026-02-14 17:35:00PHP

实现WOL（Wake-on-LAN）功能的PHP方法

WOL（Wake-on-LAN）是一种通过网络远程唤醒处于休眠或关机状态的计算机的技术。以下是使用PHP实现WOL功能的详细方法：

构造Magic Packet

Magic Packet是WOL的核心，它是一个特殊格式的网络数据包，包含目标计算机的MAC地址重复16次，前缀为6个FF（十六进制）。PHP中可通过以下代码构造：

PHP实现wol

$macAddress = '00:11:22:33:44:55'; // 替换为目标MAC地址
$macAddress = str_replace(':', '', $macAddress); // 移除分隔符
$macBinary = hex2bin($macAddress);
$magicPacket = str_repeat("\xFF", 6) . str_repeat($macBinary, 16);

发送UDP数据包

Magic Packet通常通过UDP协议发送到目标网络的广播地址（如192.168.1.255）或子网定向广播地址，端口一般为7或9：

$socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
socket_set_option($socket, SOL_SOCKET, SO_BROADCAST, 1);
socket_sendto($socket, $magicPacket, strlen($magicPacket), 0, '192.168.1.255', 9);
socket_close($socket);

完整PHP函数示例

以下是整合后的完整WOL函数实现：

PHP实现wol

function wakeOnLan($macAddress, $broadcastIp = '192.168.1.255', $port = 9) {
    // 清理MAC地址格式
    $macAddress = str_replace([':', '-', ' '], '', $macAddress);

    // 验证MAC地址格式
    if (!preg_match('/^[0-9A-Fa-f]{12}$/', $macAddress)) {
        throw new Exception('Invalid MAC address format');
    }

    // 构造Magic Packet
    $macBinary = hex2bin($macAddress);
    $magicPacket = str_repeat("\xFF", 6) . str_repeat($macBinary, 16);

    // 创建并发送UDP包
    $socket = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
    if ($socket === false) {
        throw new Exception('Socket creation failed');
    }

    socket_set_option($socket, SOL_SOCKET, SO_BROADCAST, 1);
    $result = socket_sendto($socket, $magicPacket, strlen($magicPacket), 0, $broadcastIp, $port);
    socket_close($socket);

    return $result !== false;
}