PHP套接字与android

我想问如何创建一个能够实时接收android手机请求的PHP套接字？目前，我已经完成了这部分代码，并能够使用telnet进行测试。然而，当安卓手机尝试连接时，它无法接收或向服务器发送任何内容。

if (!defined('SOCKET_ADDRESS')) {
    define('SOCKET_ADDRESS', '192.168.1.4');
}
if (!defined('SOCKET_PORT')) {
    define('SOCKET_PORT', '5888');
}
if (!defined('MAX_CLIENTS')) {
    define('MAX_CLIENTS', '10');
}
set_time_limit(0);
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1);
socket_bind($socket, SOCKET_ADDRESS, SOCKET_PORT) or die('Could not bind to address ' . SOCKET_ADDRESS . ' on port ' . SOCKET_PORT . "!'n");
socket_listen($socket, MAX_CLIENTS) or die("Could not setup socket listener!'n");
// setup read socket array
$read = array();
// client array w/ default initial socket
$clients = array('0' => array('socket' => $socket));
// force debug at first run..
$debug = true;
$time = time();
printf('Time: %d%s', $time, "'n");
$status = true;
while ($status) {
    if (time() - $time >= 10) {
        $time = time();
        printf('Time: %d%s', $time, "'n");
        $debug = true;
    }
    if ($debug === true) {
        printf('Debug: %s%s', $debug, "'n");
    }
    // $read[0] = $socket;
    if ($debug) {
        var_dump($read);
    }
    // Handle clients
    for ($i = 0; $i < count($clients); $i++) {
        if (isset($clients[$i]['socket'])) {
            if ($debug === true) {
                printf('Setting socket %d to client %d%s', $i, $i, "'n");
            }
            $read[$i] = $clients[$i]['socket'];
        }
    }
    if ($debug) {
        var_dump($read);
    }
    // Any changed sockets?
    // $write and $except are only placeholders
    $changed_sockets = socket_select($read, $write = NULL, $except = NULL, 0);
    if ($debug === true) {
        printf('Changed sockets: %d%s', $changed_sockets, "'n");
    }
    // Handle new connections
    if (in_array($socket, $read)) {
        for ($i = 0; $i < MAX_CLIENTS; $i++) {
            if (!isset($clients[$i])) {
                $clients[$i]['socket'] = socket_accept($socket);
                socket_getpeername($clients[$i]['socket'], $ip);
                $clients[$i]['ip'] = $ip;
                printf('Accepting connection into client %d from %s%s', $i, $ip, "'n");
                break;
            }
            // } elseif($i == MAX_CLIENTS - 1) {
            // echo 'Too many clients connected!', "'n";
            // }
            if ($changed_sockets < 1) {
                continue;
            }
        }
    }
    if ($debug) {
        var_dump($clients);
    }
    for ($i = 0; $i < count($clients); $i++) {
        $client = $clients[$i];
        // Has our client socket seen any changes?
        if (in_array($client['socket'], $read)) {
            printf('Client %d has changed! Reading...%s', $i, "'n");
            $data = socket_read($client['socket'], 1024);
            if ($data === false) {
                $error = socket_strerror(socket_last_error());
                printf('An error occured...%s%s', $error, "'n");
            }
            printf("Read raw data %s from client %i%s", $data, $i, "'n");
            if ($data === null) {
                // disconnected
                unset($clients[$i]);
            }
            $data = trim($data);
            if ($data == 'Q') {
                printf('Received exit command from client%s', "'n");
                socket_close($clients[$i]['socket']);
                $status = false;
            } elseif ($data) {
                // Strip whitespace
                printf('Received data: %s from client %d%s', $data, $i, "'n");
                $output = sprintf('%s%s%s', $data, "'n", chr(0));
                socket_write($client['socket'], $output);
            }
        }
    }
    // reset debug
    $debug = false;
}
socket_close($socket);