阿里云oss

$referer = "https://***.com/"; //来源仿造
$opts    = [
    'http' => [
        'header' => ["Referer: $referer\r\n"],
    ],
];
$context = stream_context_create($opts);
file_put_contents($path, file_get_contents($pdfContentPath, false, $context));

小程序添加oss防盗链数据  需要在oss添加白名单
https://servicewechat.com和https://short.weixin.qq