不用任何插件实现wordpress自动保存远程图片

将以下代码放到你的主题functions.php文件中即可，那么所有的图片地址非本站的都会自动下载并保存到你在“媒体选项”所设置的“上传文件”里的文件夹和地址。如果是空的话，那么就放在了默认的wp-conten/uploads文件夹下

/* 
* Name : auto-save-image 
* Version: 1.0.0 
* Description:自动保存非本站的远程图片 
*/ 
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 ( !empty( $_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; 
}

原文来自http://www.znsj8.com/wordpress-zidong-baocun-pic/