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filter is not described

wp_save_post_revision_post_has_changed filter-hook . WP 4.1.0

Filters whether a post has changed.

By default a revision is saved only if one of the revisioned fields has changed. This filter allows for additional checks to determine if there were changes.


add_filter( 'wp_save_post_revision_post_has_changed', 'filter_function_name_8389', 10, 3 );
function filter_function_name_8389( $post_has_changed, $last_revision, $post ){
	// filter...

	return $post_has_changed;
Whether the post has changed.
The last revision post object.
The post object.


Since 4.1.0 Introduced.

Where the hook is called

wp-includes/revision.php 181
$post_has_changed = (bool) apply_filters( 'wp_save_post_revision_post_has_changed', $post_has_changed, $last_revision, $post );

Where in WP core the hook is used WordPress

wp-includes/class-wp-customize-manager.php 2938
add_filter( 'wp_save_post_revision_post_has_changed', array( $this, '_filter_revision_post_has_changed' ), 5, 3 );
wp-includes/class-wp-customize-manager.php 2980
remove_filter( 'wp_save_post_revision_post_has_changed', array( $this, '_filter_revision_post_has_changed' ) );