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function is not described

wp_set_post_lock() WP 2.5.0

Mark the post as currently being edited by the current user

No Hooks.

Return

Array|false. Array of the lock time and user ID. False if the post does not exist, or there is no current user.

Usage

wp_set_post_lock( $post_id );
$post_id(int|WP_Post) (required)
ID or object of the post being edited.

Changelog

Since 2.5.0 Introduced.

Code of wp_set_post_lock() WP 5.8.2

function wp_set_post_lock( $post_id ) {
	$post = get_post( $post_id );
	if ( ! $post ) {
		return false;
	}

	$user_id = get_current_user_id();
	if ( 0 == $user_id ) {
		return false;
	}

	$now  = time();
	$lock = "$now:$user_id";

	update_post_meta( $post->ID, '_edit_lock', $lock );

	return array( $now, $user_id );
}