有时候我们复制粘贴别人的文章时，图片地址是别人的链接，万一哪天别人的网站挂了，图片就显示不了了，这样很没有安全感，那么怎么自动将别人的图片直接上传到自己网站服务器呢？
将以下代码加入到主题functions.php里：
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', 'jpeg', $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', 'jpeg', $file); } else { if (rename($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='jpeg', $image) { $im = imagecreatefromwebp($image); if (imagejpeg($im, str_replace('webp', 'jpeg', $image), 100)) { try { unlink($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', 'jpeg', $image); } function ecp_get_attachment_post($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);
然后你更新文章时，点了发布按钮就会自动上传外链图片（如果外链图片有权限限制，那就没法上传成功哦~）。
创作不易，用心坚持，请喝一怀爱心咖啡！继续坚持创作~~
