有时候，我们在前端写上传文件的功能时，不想弹出wordpress默认的媒体库窗口，而是直接通过自己写的PHP代码上传。 在这种情况下，自定义上传的文件目录是非常容易的，但是这些上传的文件在后台媒体库中是找不到的，也不容易管理和删除。

那么如何在不弹出网站前台默认的媒体库窗口的情况下，直接上传到媒体库呢？ 并且还支持七牛云存储、阿里云OSS等一些CDN插件，如下模板兔教你使用如下代码实现上传逻辑：

<?php
// WordPress environment
require( dirname(__FILE__) . '/../../../wp-load.php' );
$wordpress_upload_dir = wp_upload_dir();
// $wordpress_upload_dir['path'] is the full server path to wp-content/uploads/2020/11, for multisite works good as well
// $wordpress_upload_dir['url'] the absolute URL to the same folder, actually we do not need it, just to show the link to file
$i = 1; // number of tries when the file with the same name is already exists
 
$profilepicture = $_FILES['profilepicture'];
$new_file_path = $wordpress_upload_dir['path'] . '/' . $profilepicture['name'];
$new_file_mime = mime_content_type( $profilepicture['tmp_name'] );
 
if( empty( $profilepicture ) )
die( 'File is not selected.' );
 
if( $profilepicture['error'] )
die( $profilepicture['error'] );
 
if( $profilepicture['size'] > wp_max_upload_size() )
die( 'It is too large than expected.' );
 
if( !in_array( $new_file_mime, get_allowed_mime_types() ) )
die( 'WordPress doesn't allow this type of uploads.' );
 
while( file_exists( $new_file_path ) ) {
$i++;
$new_file_path = $wordpress_upload_dir['path'] . '/' . $i . '_' . $profilepicture['name'];
}
 
// looks like everything is OK
if( move_uploaded_file( $profilepicture['tmp_name'], $new_file_path ) ) {
$upload_id = wp_insert_attachment( array(
'guid'           => $new_file_path, 
'post_mime_type' => $new_file_mime,
'post_title'     => preg_replace( '/.[^.]+$/', '', $profilepicture['name'] ),
'post_content'   => '',
'post_status'    => 'inherit'
), $new_file_path );
 
// wp_generate_attachment_metadata() won't work if you do not include this file
require_once( ABSPATH . 'wp-admin/includes/image.php' );
 
// Generate and save the attachment metas into the database
wp_update_attachment_metadata( $upload_id, wp_generate_attachment_metadata( $upload_id, $new_file_path ) );
 
// Show the uploaded file in browser
wp_redirect( $wordpress_upload_dir['url'] . '/' . basename( $new_file_path ) );
}