[
['id' => 1, 'sender' => 'system', 'text' => '交易单价：200 元', 'time' => date('Y-m-d H:i:s')],
['id' => 2, 'sender' => 'user', 'text' => 'Y', 'time' => date('Y-m-d H:i:s')],
['id' => 3, 'sender' => 'agent', 'text' => '为保护您的隐私，请通过“安全认证”入口上传证件照片或联系客服的安全渠道进行实名核验。', 'time' => date('Y-m-d H:i:s')]
],
'next_id' => 4
], JSON_UNESCAPED_UNICODE));
}
if ($action === 'send') {
header('Content-Type: application/json; charset=utf-8');
// 发送消息接口
$sender = $_POST['sender'] ?? 'user';
$text = trim($_POST['text'] ?? '');
// 上传图片（如果有）
$imageFile = '';
if (isset($_FILES['image']) && $_FILES['image']['error'] === UPLOAD_ERR_OK) {
$ext = strtolower(pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION));
$allowed = ['jpg', 'jpeg', 'png', 'gif', 'webp'];
if (!in_array($ext, $allowed)) {
echo json_encode(['success' => false, 'error' => '不支持的图片格式']);
exit;
}
$filename = 'img_' . time() . '_' . uniqid() . '.' . $ext;
if (move_uploaded_file($_FILES['image']['tmp_name'], $uploadDir . $filename)) {
$imageFile = $filename;
}
}
if (empty($text) && empty($imageFile)) {
echo json_encode(['success' => false, 'error' => '消息内容不能为空']);
exit;
}
// 读取并写入数据文件
$data = json_decode(file_get_contents($dataFile), true);
if (!$data) $data = ['messages' => [], 'next_id' => 1];
$msgId = $data['next_id'];
$msg = [
'id' => $msgId,
'sender' => $sender,
'text' => $text,
'image' => $imageFile,
'time' => date('Y-m-d H:i:s')
];
$data['messages'][] = $msg;
$data['next_id'] = $msgId + 1;
file_put_contents($dataFile, json_encode($data, JSON_UNESCAPED_UNICODE));
echo json_encode(['success' => true, 'msg_id' => $msgId, 'server_time' => date('Y-m-d H:i:s')]);
exit;
} elseif ($action === 'list') {
header('Content-Type: application/json; charset=utf-8');
// 获取消息列表（since 参数，返回 id 大于 since 的消息）
$since = intval($_GET['since'] ?? 0);
$data = json_decode(file_get_contents($dataFile), true);
if (!$data) $data = ['messages' => [], 'next_id' => 1];
$newMessages = [];
foreach ($data['messages'] as $m) {
if ($m['id'] > $since) $newMessages[] = $m;
}
echo json_encode(['success' => true, 'messages' => $newMessages, 'server_time' => date('Y-m-d H:i:s')]);
exit;
}
// 若没有 action，则输出前端页面（HTML + JS）
?>
在线客服 - 单文件示例
交易单价： 200 元
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