wordpress自动本地化外链图片

//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 = get_bloginfo('url');
    }
    if (get_option('uploads_use_yearmonth_folders')) {
        $upload_url_path.= '/wp-content/uploads/' . 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;)/', '&', $string);
    }
    return $string;
}