代码实现wordpress远程图片自动本地化

    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;

    }