关键是不好调试：

代码：

<!--?php &lt;br ?--> /*
Plugin Name: B站自媒体同步工具
Plugin URI: http://example.com
Description: A brief description of what the plugin does.
Version: 1.0
Author: 华哥
Author URI: http://example.com
License: GPL2
*/

class BilibiliUploader {
public function __construct() {
add_action('save_post', [$this, 'upload_images_to_bilibili']);
}

public function upload_images_to_bilibili($post_id) {
if (wp_is_post_revision($post_id)) {
return;
}

$post_content = get_post_field('post_content', $post_id);
preg_match_all('/&lt;img[^&gt;]+src="([^"&gt;]+)"/i', $post_content, $matches);

if (!empty($matches[1])) {
foreach ($matches[1] as $image_url) {
$this-&gt;process_image($image_url);
}
}
}

private function process_image($image_url) {
$temp_file = download_url($image_url);

if (is_wp_error($temp_file)) {
error_log('Failed to download image: ' . $image_url);
return;
}

$this-&gt;uploadFile($temp_file);
unlink($temp_file);
}

public function uploadFile($imagePath) {
if (!file_exists($imagePath)) {
error_log("文件不存在: $imagePath");
return;
}

error_log("开始上传图片到Bilibili: $imagePath");
$response = $this-&gt;makeRequest($imagePath);
if ($response) {
$this-&gt;handleResponse($response);
} else {
error_log("请求失败");
}
}

private function makeRequest($imagePath) {
$url = "https://api.bilibili.com/x/dynamic/feed/draw/upload_bfs";
$boundary = "---------------------------" . uniqid(); // 使用动态生成的boundary

$headers = [
"User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:130.0) Gecko/20100101 Firefox/130.0",
"Accept: */*",
"Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2",
"Accept-Encoding: gzip, deflate", // 修改为与原始代码一致
"Referer: https://t.bilibili.com/",
"Origin: https://t.bilibili.com",
"Connection: keep-alive",
"Cookie: 4534234Cl4=A1F0A409-3626-8333-8964-2B9F32D92EC840243-023101913-MnLxL6Vqo8JzkbhjsXOcgQ%3D%3D; buvid_fp=5e9a8088e2093db52ac4432fb2bb81c2; enable_web_push=DISABLE; header_theme_version=CLOSE; home_feed_column=5; browser_resolution=1536-703; fingerprint=5e9a8088e2093db52ac4432fb2bb81c2; buvid_fp_plain=undefined; CURRENT_FNVAL=4048; rpdid=|(J~J|Rm|RuJ0J'uYm~~)kmY|; b_lsid=C342BDD2_192541C1C36; bsource=search_baidu; SESSDATA=2c853358%2C1743540007%2C1c395%2Aa1CjBoQPqw1p54Ut1L3sUZ-iKwDSkFrIWeDJfsmBhzhgNoqGgTCiG-SoohDFKKH0WS5PUSVjRZY0FnQWREVTZQbDFGS0J5d2FiTU9XeVNFU0huOEZES3B1c19UaEFiT1NwYTdBSlhTZWJmczQ5bFJNaWx4YTVkcEljdS1FaVhoVnY5Ql9JNTFJbkl3IIEC; bili_jct=f4a19205ce0e5fdfd26441438b9fd811; DedeUserID=15621741; DedeUserID__ckMd5=a7b49f848348c797; sid=h6yrhg31; hit-dyn-v2=1; bili_ticket=eyJhbGciOiJIUzI1NiIsImtpZCI6InMwMyIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MjgyNDcyMTQsImlhdCI6MTcyNzk4Nzk1NCwicGx0IjotMX0._g00SN27Nu3SJHAshhrK1WSCVryiM5PsYy2j1VNhSsQ; bili_ticket_expires=1728247154",
"Sec-Fetch-Dest: empty",
"Sec-Fetch-Mode: cors",
"Sec-Fetch-Site: same-site",
"Content-Type: multipart/form-data; boundary=$boundary"
];

$body = "--$boundaryrn" .
"Content-Disposition: form-data; name="file_up"; filename="" . basename($imagePath) . ""rn" .
"Content-Type: image/jpegrnrn" .
file_get_contents($imagePath) . "rn" .
"--$boundaryrn" .
"Content-Disposition: form-data; name="biz"rnrn" .
"new_dynrn" .
"--$boundaryrn" .
"Content-Disposition: form-data; name="category"rnrn" .
"dailyrn" .
"--$boundaryrn" .
"Content-Disposition: form-data; name="csrf"rnrn" .
"f4a19205ce0e5fdfd26441438b9fd811rn" .
"--$boundary--rn";

$options = [
'http' =&gt; [
'method' =&gt; 'POST',
'header' =&gt; implode("rn", $headers),
'content' =&gt; $body
]
];

$context = stream_context_create($options);
return file_get_contents($url, false, $context);
}

private function handleResponse($response) {
$jsonResponse = json_decode($response, true);
if ($jsonResponse &amp;&amp; $jsonResponse['code'] === 0) {
error_log("上传成功！");
$imageUrl = $jsonResponse['data']['image_url'] ?? '';
if ($imageUrl) {
error_log("图片URL: $imageUrl");
}
} else {
error_log("上传失败。错误信息: " . ($jsonResponse['message'] ?? '未知错误'));
}
}
}

// 初始化插件
new BilibiliUploader();
?&gt;