// 从文本域解析图片URL，返回指定数量的不同随机图片URL
private function get_random_img_urls( $count = 1 ) {
$raw = get_option( self::OPTION_IMG_URLS, '' );
if ( empty( $raw ) ) return array();
$lines = explode( "\n", $raw );
$urls = array();
foreach ( $lines as $line ) {
$url = trim( $line );
if ( ! empty( $url ) ) {
$urls[] = $url;
}
}
if ( empty( $urls ) ) return array();
// 打乱数组顺序，保证随机性
shuffle( $urls );
// 如果需要的数量大于可用数量，循环补充
$result = array();
$urlCount = count( $urls );
for ( $i = 0; $i < $count; $i++ ) {
$result[] = $urls[ $i % $urlCount ];
}
return $result;
}
// 单张随机图兼容方法（保留原有调用）
private function get_random_img_url() {
$urls = $this->get_random_img_urls( 1 );
return $urls ? $urls[0] : '';
}
private function process_post( $post_id, $source ) {
$post = get_post( $post_id );
if ( ! $post || 'publish' !== $post->post_status ) return;
$content = (string)$post->post_content;
$images = $this->extract_image_urls( $content );
// 文章无图片 → 中间插入图片（原有逻辑不变）
if ( empty( $images ) ) {
$new_img_url = $this->get_random_img_url();
if ( empty( $new_img_url ) ) {
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'failed',
'reason' => '未配置可用图片地址，无法新增图片',
'image_count' => 0,
'broken_count' => 0,
'replaced_count' => 0,
'old_urls' => array(),
'new_urls' => array(),
'run_source' => $source
) );
return;
}
$img_tag = ' . ')
';
$content_len = mb_strlen( $content );
$mid_pos = (int)( $content_len / 2 );
$new_content = mb_substr( $content, 0, $mid_pos ) . $img_tag . mb_substr( $content, $mid_pos );
$updated = wp_update_post( array(
'ID' => $post_id,
'post_content' => $new_content
), true );
if ( is_wp_error( $updated ) ) {
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'failed',
'reason' => '新增图片失败：' . $updated->get_error_message(),
'image_count' => 0,
'broken_count' => 0,
'replaced_count' => 1,
'old_urls' => array(),
'new_urls' => array( $new_img_url ),
'run_source' => $source
) );
return;
}
clean_post_cache( $post_id );
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'add_image',
'reason' => '文章无图片，已在内容中间插入图片',
'image_count' => 1,
'broken_count' => 0,
'replaced_count' => 1,
'old_urls' => array(),
'new_urls' => array( $new_img_url ),
'run_source' => $source
) );
return;
}
// 检测失效图片（原有逻辑不变）
$broken_urls = array();
$reasons = array();
foreach ( $images as $url ) {
$check = $this->is_image_url_valid( $url );
if ( ! $check['valid'] ) {
$broken_urls[] = $url;
$reasons[] = $url . ' => ' . $check['reason'];
}
}
$broken_urls = array_values( array_unique( $broken_urls ) );
if ( empty( $broken_urls ) ) {
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'no_need',
'reason' => '所有图片均可正常访问',
'image_count' => count( $images ),
'broken_count' => 0,
'replaced_count' => 0,
'old_urls' => array(),
'new_urls' => array(),
'run_source' => $source
) );
return;
}
// 替换失效图片（核心修改部分）
$new_content = $content;
$replace_map = array();
$replaced_count = 0;
$failed_reason = '';
// 获取与失效图片数量匹配的随机备用图
$rand_imgs = $this->get_random_img_urls( count( $broken_urls ) );
if ( empty( $rand_imgs ) ) {
$failed_reason = '未配置可用图片地址，无法替换';
} else {
// 为每个失效URL分配不同的备用图
foreach ( $broken_urls as $index => $bad_url ) {
$new_img = $rand_imgs[ $index ];
if ( false !== strpos( $new_content, $bad_url ) ) {
$new_content = str_replace( $bad_url, $new_img, $new_content );
$replace_map[ $bad_url ] = $new_img;
$replaced_count++;
}
}
}
if ( $failed_reason ) {
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'failed',
'reason' => $failed_reason . '；失效明细：' . implode( '；', $reasons ),
'image_count' => count( $images ),
'broken_count' => count( $broken_urls ),
'replaced_count' => $replaced_count,
'old_urls' => $broken_urls,
'new_urls' => $replace_map,
'run_source' => $source
) );
return;
}
if ( $new_content === $content || $replaced_count <= 0 ) {
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'failed',
'reason' => '检测到失效图片，但未能完成替换；失效明细：' . implode( '；', $reasons ),
'image_count' => count( $images ),
'broken_count' => count( $broken_urls ),
'replaced_count' => 0,
'old_urls' => $broken_urls,
'new_urls' => $replace_map,
'run_source' => $source
) );
return;
}
$updated = wp_update_post( array(
'ID' => $post_id,
'post_content' => $new_content
), true );
if ( is_wp_error( $updated ) ) {
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'failed',
'reason' => '文章更新失败：' . $updated->get_error_message(),
'image_count' => count( $images ),
'broken_count' => count( $broken_urls ),
'replaced_count' => 0,
'old_urls' => $broken_urls,
'new_urls' => $replace_map,
'run_source' => $source
) );
return;
}
clean_post_cache( $post_id );
$this->insert_log( array(
'post_id' => $post_id,
'post_title' => get_the_title( $post_id ),
'status' => 'success',
'reason' => '已替换失效图片；失效明细：' . implode( '；', $reasons ),
'image_count' => count( $images ),
'broken_count' => count( $broken_urls ),
'replaced_count' => $replaced_count,
'old_urls' => $broken_urls,
'new_urls' => $replace_map,
'run_source' => $source
) );
}
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