{$action}_prefilter – Hook | Developer.WordPress.org

apply_filters( “{$action}_prefilter”, array $file )

Filters the data for a file before it is uploaded to WordPress.

Description

The dynamic portion of the hook name, $action, refers to the post action.

Possible hook names include:

$filearray

Reference to a single element from $_FILES.

name string
The original name of the file on the client machine.
type string
The mime type of the file, if the browser provided this information.
tmp_name string
The temporary filename of the file in which the uploaded file was stored on the server.
size int
The size, in bytes, of the uploaded file.
error int
The error code associated with this file upload.

$file = apply_filters( "{$action}_prefilter", $file );

Version	Description
4.0.0	Converted to a dynamic hook with `$action`.
2.9.0	Introduced.

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