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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.
Line | Code |
---|---|
378 | wp_delete_post_revision( $old_autosave->ID ); |
379 | return new WP_Error( |
380 | 'rest_autosave_no_changes', |
381 | __( 'There is nothing to save. The autosave and the post content are the same.' ), |
382 | array( 'status' => 400 ) |
383 | ); |
384 | } |
385 |
|
386 | /** This filter is documented in wp-admin/post.php */ |
387 | do_action( 'wp_creating_autosave', $new_autosave ); |
388 |
|
389 | // wp_update_post() expects escaped array. |
390 | return wp_update_post( wp_slash( $new_autosave ) ); |
391 | } |
392 |
|
393 | // Create the new autosave as a special post revision. |
394 | return _wp_put_post_revision( $post_data, true ); |
395 | } |
396 |
|