Check the documentation wp_handle_upload
You need to include the file.php before calling wp_handle_upload
require_once( ABSPATH . 'wp-admin/includes/file.php' )
Related Posts:
- How to generate thumbnails when needed only?
- Media files exist in upload folder but not showing up
- Set limit to media upload?
- Save camera info as metadata on image upload?
- How to upload SVG in WordPress 4.9.8?
- Use a separate custom table (not posts) to handle file upload data
- PNG with transparent background turns black when uploaded and resized
- WP 3.3 > Still no option to enable automatic image overwrites?
- Custom upload directory per CPT; when removed, file not deleted
- Modify featured image path to Amazon S3
- How to set an upload directory for each media type?
- How to get all files inserted (but not attached) to a post
- Trigger JS when featured image upload window is opened in admin
- uploading files to the uploads folder via ftp
- Modify the array of selected images in media modal
- How can I upload SVG images using the media uploader?
- Delete images uploaded by ‘Subscriber’ role
- Remove upload_files capability from a role but allow role to manage an avatar image
- 3.5 media manager add CSS / JS to new ‘tab’ iframe content
- post_id missing from the wp-admin file upload request
- Insert Featured image from Feed
- http error when uploading media files
- How can I upload a csv file into WordPress?
- How to link to the image editor’s Edit Image function?
- HTTP Error when uploading mp4 video file
- Change the size of the image preview on the media edit page
- “upload_mimes” filter not working. Need to allow WOFF and WOFF2
- Saving WordPress generated thumbnails in a subdirectory
- Hook or function to upload media via url
- Close the media-upload thickbox right after upload is finished?
- wp_generate_attachment_metadata generates 503 Service Unavailable or 500 timeout errors
- How can I receive the image id using the media box?
- wp_enqueue_media() Will not load JS on the theme
- media sideload image not working with JPG file
- Placing assets for external use
- programmatically create posts from files in a folder
- add_image_size() and uploading the exact size leaves 1×1 image in uploads
- How do I insert an already uploaded video file into my Media Library?
- Split up files from one big folder to multiple folders in uploads after migration
- Display attachments by the ID of the post being edited in the wp.media frame (frontend)
- Media Gallery Upload photo incorrect way like glitch
- WordPress uploads autocreate folder every month
- Enabling users to upload files
- Extra “uploads” added in path
- Is there a way to make my media files unsearchable?
- Error uploading images (but the images are at the server!)
- Is it possible to use media_sideload_image to upload local files?
- How to switch to year/month directory structure format from a single folder
- Attach media to post by media category
- Rename attachment filenames to attachment ID on upload
- WordPress Media Library showing wrong preview size?
- Restrict authors to seeing ONLY their media files
- How to edit attachment with media-upload.php?
- How to fix the orientation of images when uploading via the WordPress Media Uploader? [closed]
- Uploading PDF files from the front-end
- Uploads going to the root of wp-content/uploads
- WordPress Images, Header Videos and Carousel is not working live but perfect on Local Host Is It FTP? Filezilla?
- Uploaded image with non-english characters is named incorrectly in upload folder
- Can’t upload images (incorrect “file exceeds upload_max_filesize” error)
- Anybody knows if i could upload a leaflet or openlayers3 map to wordpress webpage?
- “Trying to upload files larger than” error will not go away
- Theoretical limit of upload file size [duplicate]
- Remove Media File Items From Server That Do Not Exist in Media Library
- How to add filetype to meta value when using wp_upload_bits?
- Cropping thumbnails to specific dimensions on front end post
- Double slash in upload URLs
- Unable to upload new file as a product
- Efficient way to move media folder to another folder
- Limit users to specific uploads
- Make inline uploader (plupload) on options page upload to a specific folder
- WordPress blog with a custom made theme hosted on heroku
- media file uploading
- What is wrong with my wp_insert_attachment code?
- Editor User Role can’t see other users media
- How to allow .ged file uploads
- Media files not loading
- problem when uploading file by metaboxes
- Set attachment category from file name on upload
- HTTP Error WordPress on IIS uploading image
- What folder to place Large Video files?
- WordPress Upload Speed
- _d_improd_ directory in uploads breaking site images
- Organizing the Media Library for Cleanup
- Allow author to upload image via Media button without plugin
- Drag and Drop Media Not Working in Windows 10 Edge Browser
- Exclude some photos in media library
- Failed to load resource at admin screen
- Make custom thumbnail size image in media_sideload_image function
- Upload more than one media files with a post
- Upload file to front-end form and send as email attachment
- uploading photos
- How to handle image resize in media_handle_sideload?
- Image uploaded in media library, can only see it when I using the WP Edit Image feature. 404 when trying to view in browser
- Single file upload
- Host Images from Link
- Upload media error: unable to create directory (windows hosting)
- Add frontend editor with media buttons for Visitors and display only their media
- Can’t upload files 1MB+ [closed]
- I want to customize wp.media (the wordpress admin uploader) in order to change the file name but only in video custom post type
- Create media folder upon post publish?