WordPress教程 文章远程图片(外链)自动本地化 纯代码实现

wordpress 远程图片本地化,其实有很多插件是可以实现的,但是有可能插件太多了,会影响网站的性能或者拖累服务器,降低网站的运行速度。

那我们在尽量少用插件的情况下用代码实现不是更好,那么下面这段“wordpress 远程图片自动本地化“的代码也许适合你。

教程开始:

复制下面的代码,然后粘贴到你主题的(functions.php)文件中保存即可:

// 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 ( !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."
"; 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; }

注:由于蓝米兔博客是用插件将图片储存到OSS里面的,所以上面的代码蓝米兔并未验证是否有效,需要的朋友可以自行测试一下,应该没问题,修改代码之前记得备份,切记!

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