_wp_post_revision_fields – Hook | Developer.WordPress.org

apply_filters( ‘_wp_post_revision_fields’, string[] $fields, array $post )

Filters the list of fields saved in post revisions.

Description

Included by default: ‘post_title’, ‘post_content’ and ‘post_excerpt’.

Disallowed fields: ‘ID’, ‘post_name’, ‘post_parent’, ‘post_date’, ‘post_date_gmt’, ‘post_status’, ‘post_type’, ‘comment_count’, and ‘post_author’.

$fieldsstring[]: List of fields to revision. Contains 'post_title', 'post_content', and 'post_excerpt' by default.
$postarray: A post array being processed for insertion as a post revision.

$fields = apply_filters( '_wp_post_revision_fields', $fields, $post );

Used by	Description
_wp_post_revision_fields()`wp-includes/revision.php`	Determines which fields of posts are to be saved in revisions.

Version	Description
4.5.0	The `$post` parameter was added.
2.6.0	Introduced.

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