// 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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