批量将 WordPress 文章中的外链图片导入到本地-小四运营

据报，新浪博客已正式宣布“相册”功能下线，最后期限是2019年7月31日24时，又一个免费的午餐没了。

如何把放在新浪相册的图片下载到本地并替换原来的链接，摆在了众多使用新浪免费图床用户面前，当然也包括我。经多方查找测试，将本人最终解决办法，分享给大家。

WordPress很多插件或者代码都可以实现在编辑文章中自动将外链图片下载到本地，最终我选择了一个叫：Easy Copy Paste的插件。

插件下载

提取码: khc5

也可以直接将下面的代码，添加到当前主题函数模板 functions.php 中：

function ecp_save_post($post_id, $post) {
	global $wpdb;
	if($post->post_status == \'publish\') {
		$p   = \'/<img.*[\\s]src=[\\\"|\\\'](.*)[\\\"|\\\'].*>/iU\';
		$num = preg_match_all($p, $post->post_content, $matches);
		if ($num) {
			$wp_upload_dir = wp_upload_dir();
			set_time_limit(0);
			$ch = curl_init();
			curl_setopt($ch, CURLOPT_HEADER, false);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
			curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
			curl_setopt($ch, CURLOPT_MAXREDIRS,20);
			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);

			$ecp_options = $_SERVER[\'HTTP_HOST\'];
			foreach ($matches[1] as $src) {
				if (isset($src) && strpos($src, $ecp_options) === false) {
					$file_info = wp_check_filetype(basename($src), null);
					if ($file_info[\'ext\'] == false) {
						date_default_timezone_set(\'PRC\');
						$file_name = date(\'YmdHis-\').dechex(mt_rand(100000, 999999)).\'.tmp\';
					} else {
						$file_name = dechex(mt_rand(100000, 999999)) . \'-\' . basename($src);
					}
					curl_setopt($ch, CURLOPT_URL, $src);
					$file_path = $wp_upload_dir[\'path\'] . \'/\' . $file_name;
					$img = fopen($file_path, \'wb\');
					curl_setopt($ch, CURLOPT_FILE, $img);
					$img_data  = curl_exec($ch);
					fclose($img);

					if (file_exists($file_path) && filesize($file_path) > 0) {
						$t   = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
						$arr = explode(\'/\', $t);
						if (pathinfo($file_path, PATHINFO_EXTENSION) == \'tmp\') {
							$file_path = ecp_handle_ext($file_path, $arr[1], $wp_upload_dir[\'path\'], $file_name, \'tmp\');
						} elseif (pathinfo($file_path, PATHINFO_EXTENSION) == \'webp\') {
							$file_path = ecp_handle_ext($file_path, $arr[1], $wp_upload_dir[\'path\'], $file_name, \'webp\');
						}
						$post->post_content  = str_replace($src, $wp_upload_dir[\'url\'] . \'/\' . basename($file_path), $post->post_content);
						$attachment = ecp_get_attachment_post(basename($file_path), $wp_upload_dir[\'url\'] . \'/\' . basename($file_path));
						$attach_id = wp_insert_attachment($attachment, ltrim($wp_upload_dir[\'subdir\'] . \'/\' . basename($file_path), \'/\'), 0);
						$attach_data = wp_generate_attachment_metadata($attach_id, $file_path);
						$ss = wp_update_attachment_metadata($attach_id, $attach_data);
					}
				}
			}
			curl_close($ch);
			$wpdb->update( $wpdb->posts, array(\'post_content\' => $post->post_content), array(\'ID\' => $post->ID));
		}
	}
}

function ecp_handle_ext($file, $type, $file_dir, $file_name, $ext) {
	switch ($ext) {
		case \'tmp\':
			if (rename($file, str_replace(\'tmp\', $type, $file))) {
				if (\'webp\' == $type) {
					return ecp_image_convert(\'webp\', \'jpg\', $file_dir . \'/\' . str_replace(\'tmp\', $type, $file_name));
				}
				return $file_dir . \'/\' . str_replace(\'tmp\', $type, $file_name);
			}
		case \'webp\':
			if (\'webp\' == $type) {
				return ecp_image_convert(\'webp\', \'jpg\', $file);
			} else {
				if (rename($file, str_replace(\'webp\', $type, $file))) {
					return $file_dir . \'/\' . str_replace(\'webp\', $type, $file_name);
				}
			}
		default:
			return $file;
	}
}

function ecp_image_convert($from=\'webp\', $to=\'jpg\', $image) {
	$im = imagecreatefromwebp($image);
	if (imagejpg($im, str_replace(\'webp\', \'jpg\', $image), 100)) {
		try {
			unlink($image);
		} catch (Exception $e) {
			$error_msg = sprintf(\'Error removing local file %s: %s\', $image,
				$e->getMessage());
			error_log($error_msg);
		}
	}
	imagedestroy($im);

	return str_replace(\'webp\', \'jpg\', $image);
}

function ecp_get_attachment_post($filename, $url) {
	$file_info  = wp_check_filetype($filename, null);
	return array(
		\'guid\'           => $url,
		\'post_type\'      => \'attachement\',
		\'post_mime_type\' => $file_info[\'type\'],
		\'post_title\'     => preg_replace(\'/\\.[^.]+$/\', \'\', $filename),
		\'post_content\'   => \'\',
		\'post_status\'    => \'inherit\'
	);
}
add_action(\'save_post\', \'ecp_save_post\', 120, 2);

代码取自上述插件。