WordPress上传文件存放到不同目录的方法-木庄网络博客

本文整理自网络，侵删。

有时候将不同类型的文件分门别类存储，似乎比年月目录更有意义。例如幻灯片应该存储在slides目录下，下载文件应该存储在downloads文件夹下。就说幻灯片slideshow，我比较喜欢用自定义文章类型（Custom Post Type）实现，有些幻灯片脚本比较个性，不支持绝对路径，必须用相对路径，然后用base参数设置相对于哪个文件夹，这样幻灯片必须存储在某个特定的文件夹中，年月形式显然不满足要求。所以，我们需要条件化的设置上传目录。

一、为Custom Post Type设置上传目录

假设我要将所有在幻灯片类型的文章中上传的文件存储到/wp-content/uploads/slides文件夹中，将下面的代码放到主题的functions.php中即可

代码如下:

function custom_upload_directory( $uploads ) {
$id = $_REQUEST['post_id'];
$parent = get_post( $id )->post_parent;
if( "post-type" == get_post_type( $id ) || "post-type" == get_post_type( $parent ) ) {
$subdir = 'slides';
$uploads['subdir'] = $subdir;
$uploads['path'] = $uploads['basedir'].DIRECTORY_SEPARATOR.$subdir;
$uploads['url'] = $uploads['baseurl'].'/'.$subdir;
}
return $uploads;
}
add_filter( 'upload_dir', 'custom_upload_directory' );
将post-type替换成自己的自定义文章类型名称，将你要创建的子目录赋值给$subdir。

二、将文件保存到插件目录

下面的代码要用在插件中，文件会保存到插件目录下的uploads文件夹下。

代码如下:

/**
* Change Upload Directory for Custom Post-Type
*
* This will change the upload directory for a custom post-type. Attachments will
* now be uploaded to an "uploads" directory within the folder of your plugin. Make
* sure you swap out "post-type" in the if-statement with the appropriate value...
*/
function custom_upload_directory( $args ) {
$id = $_REQUEST['post_id'];
$parent = get_post( $id )->post_parent;
// Check the post-type of the current post
if( "post-type" == get_post_type( $id ) || "post-type" == get_post_type( $parent ) ) {
$args['path'] = plugin_dir_path(__FILE__) . "uploads";
$args['url'] = plugin_dir_url(__FILE__) . "uploads";
$args['basedir'] = plugin_dir_path(__FILE__) . "uploads";
$args['baseurl'] = plugin_dir_url(__FILE__) . "uploads";
}
return $args;
}
add_filter( 'upload_dir', 'custom_upload_directory' );
如果要以年月形式保存，修改一下代码即可

代码如下:

$args['path'] = plugin_dir_path(__FILE__) . "uploads" . $args['subdir'];
$args['url'] = plugin_dir_url(__FILE__) . "uploads" . $args['subdir'];

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