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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 1993 | /** |
| 1994 | * Fires before an autosave is stored. |
| 1995 | * |
| 1996 | * @since 4.1.0 |
| 1997 | * @since 6.4.0 The `$is_update` parameter was added to indicate if the autosave is being updated or was newly created. |
| 1998 | * |
| 1999 | * @param array $new_autosave Post array - the autosave that is about to be saved. |
| 2000 | * @param bool $is_update Whether this is an existing autosave. |
| 2001 | */ |
| 2002 | do_action( 'wp_creating_autosave', $new_autosave, true ); |
| 2003 | return wp_update_post( $new_autosave ); |
| 2004 | } |
| 2005 | |
| 2006 | // _wp_put_post_revision() expects unescaped. |
| 2007 | $post_data = wp_unslash( $post_data ); |
| 2008 | |
| 2009 | // Otherwise create the new autosave as a special post revision. |
| 2010 | $revision = _wp_put_post_revision( $post_data, true ); |
| 2011 | |
| 2012 | if ( ! is_wp_error( $revision ) && 0 !== $revision ) { |
| 2013 | |
| 2014 | /** This action is documented in wp-admin/includes/post.php */ |
| 2015 | do_action( 'wp_creating_autosave', get_post( $revision, ARRAY_A ), false ); |
| 2016 | } |
| 2017 | |
| 2018 | return $revision; |
| 2019 | } |
| 2020 | |
| 2021 | /** |
| 2022 | * Autosaves the revisioned meta fields. |
| 2023 | * |
| 2024 | * Iterates through the revisioned meta fields and checks each to see if they are set, |