Contextually filter a post revision field.

Description

The dynamic portion of the hook name, $field, corresponds to a name of a field of the revision object.

Possible hook names include:

• _wp_post_revision_field_post_title
• _wp_post_revision_field_post_content
• _wp_post_revision_field_post_excerpt

Parameters

$revision_fieldstring

The current revision field to compare to or from.

$fieldstring

The current revision field.

$compare_fromWP_Post

The revision post object to compare to or from.

$contextstring

The context of whether the current revision is the old or the new one. Either 'to' or 'from'.

Source

$content_from = $compare_from ? apply_filters( "_wp_post_revision_field_{$field}", $compare_from->$field, $field, $compare_from, 'from' ) : '';

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