不知道什么时候开始出现的这个功能，据说是某编辑器带的功能，然后人们就很happy的直接插入外链的图片，后来移除了编辑器后、或者说外链使用了防盗链后就嗝屁了，因此把图片放在本地服务器才是最保险的！
2015-02-21补充《WordPress外链图片手动下载插件—Import External Images》
如何实现？依然还是要靠functions.php，打开functions.php，加入以下代码
- //自动本地化外链图片
- add_filter('content_save_pre', 'auto_save_image');
- function auto_save_image($content) {
- $upload_path = '';
- $upload_url_path = get_bloginfo('url');
- //上传目录
- if (($var = get_option('upload_path')) !=''){
- $upload_path = $var;
- } else {
- $upload_path = 'wp-content/uploads';
- }
- if(get_option('uploads_use_yearmonth_folders')) {
- $upload_path .= '/'.date("Y",time()).'/'.date("m",time());
- }
- //文件地址
- if(($var = get_option('upload_url_path')) != '') {
- $upload_url_path = $var;
- } else {
- $upload_url_path = bloginfo('url');
- }
- if(get_option('uploads_use_yearmonth_folders')) {
- $upload_url_path .= '/'.date("Y",time()).'/'.date("m",time());
- }
- require_once ("../wp-includes/class-snoopy.php");
- $snoopy_Auto_Save_Image = new Snoopy;
- $img = array();
- //以文章的标题作为图片的标题
- if ( !emptyempty( $_REQUEST['post_title'] ) )
- $post_title = wp_specialchars( stripslashes( $_REQUEST['post_title'] ));
- $text = stripslashes($content);
- if (get_magic_quotes_gpc()) $text = stripslashes($text);
- preg_match_all("/ src=(\"|\'){0,}(http:\/\/(.+?))(\"|\'|\s)/is",$text,$img);
- $img = array_unique(dhtmlspecialchars($img[2]));
- foreach ($img as $key => $value){
- set_time_limit(180); //每个图片最长允许下载时间,秒
- if(str_replace(get_bloginfo('url'),"",$value)==$value&&str_replace(get_bloginfo('home'),"",$value)==$value){
- //判断是否是本地图片，如果不是，则保存到服务器
- $fileext = substr(strrchr($value,'.'),1);
- $fileext = strtolower($fileext);
- if($fileext==""||strlen($fileext)>4)
- $fileext = "jpg";
- $savefiletype = array('jpg','gif','png','bmp');
- if (in_array($fileext, $savefiletype)){
- if($snoopy_Auto_Save_Image->fetch($value)){
- $get_file = $snoopy_Auto_Save_Image->results;
- }else{
- echo "error fetching file: ".$snoopy_Auto_Save_Image->error."<br>";
- echo "error url: ".$value;
- die();
- }
- $filetime = time();
- $filepath = "/".$upload_path;//图片保存的路径目录
- !is_dir("..".$filepath) ? mkdirs("..".$filepath) : null;
- //$filename = date("His",$filetime).random(3);
- $filename = substr($value,strrpos($value,'/'),strrpos($value,'.')-strrpos($value,'/'));
- //$e = '../'.$filepath.$filename.'.'.$fileext;
- //if(!is_file($e)) {
- // copy(htmlspecialchars_decode($value),$e);
- //}
- $fp = @fopen("..".$filepath.$filename.".".$fileext,"w");
- @fwrite($fp,$get_file);
- fclose($fp);
- $wp_filetype = wp_check_filetype( $filename.".".$fileext, false );
- $type = $wp_filetype['type'];
- $post_id = (int)$_POST['temp_ID2'];
- $title = $post_title;
- $url = $upload_url_path.$filename.".".$fileext;
- $file = $_SERVER['DOCUMENT_ROOT'].$filepath.$filename.".".$fileext;
- //添加数据库记录
- $attachment = array(
- 'post_type' => 'attachment',
- 'post_mime_type' => $type,
- 'guid' => $url,
- 'post_parent' => $post_id,
- 'post_title' => $title,
- 'post_content' => '',
- );
- $id = wp_insert_attachment($attachment, $file, $post_parent);
- $text = str_replace($value,$url,$text); //替换文章里面的图片地址
- }
- }
- }
- $content = AddSlashes($text);
- remove_filter('content_save_pre', 'auto_save_image');
- return $content;
- }
- function mkdirs($dir)
- {
- if(!is_dir($dir))
- {
- mkdirs(dirname($dir));
- mkdir($dir);
- }
- return ;
- }
- function dhtmlspecialchars($string) {
- if(is_array($string)) {
- foreach($string as $key => $val) {
- $string[$key] = dhtmlspecialchars($val);
- }
- }else{
- $string = str_replace('&', '&', $string);
- $string = str_replace('"', '"', $string);
- $string = str_replace('<', '<', $string);
- $string = str_replace('>', '>', $string);
- $string = preg_replace('/&(#\d;)/', '&\1', $string);
- }
- return $string;
- }
搞完收功！