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apply_filters( 'wp_generate_attachment_metadata', array $metadata, int $attachment_id, string $context )

Filters the generated attachment meta data.

Parameters

$metadata: (array) An array of attachment meta data.
$attachment_id: (int) Current attachment ID.
$context: (string) Additional context. Can be 'create' when metadata was initially created for new attachment or 'update' when the metadata was updated.

Source

File: wp-admin/includes/image.php

Used By

Used By	Description
wp-admin/includes/image.php: wp_update_image_subsizes()	If any of the currently registered image sub-sizes are missing, create them and update the image meta data.
wp-admin/includes/image.php: wp_generate_attachment_metadata()	Generate attachment meta data and create image sub-sizes for images.

Changelog

Version	Description
5.3.0	The `$context` parameter was added.
2.1.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/wp_generate_attachment_metadata