get_default_post_to_edit( string $post_type = 'post', bool $create_in_db = false )

function get_default_post_to_edit( $post_type = 'post', $create_in_db = false ) {
	$post_title = '';
	if ( !empty( $_REQUEST['post_title'] ) )
		$post_title = esc_html( wp_unslash( $_REQUEST['post_title'] ));

	$post_content = '';
	if ( !empty( $_REQUEST['content'] ) )
		$post_content = esc_html( wp_unslash( $_REQUEST['content'] ));

	$post_excerpt = '';
	if ( !empty( $_REQUEST['excerpt'] ) )
		$post_excerpt = esc_html( wp_unslash( $_REQUEST['excerpt'] ));

	if ( $create_in_db ) {
		$post_id = wp_insert_post( array( 'post_title' => __( 'Auto Draft' ), 'post_type' => $post_type, 'post_status' => 'auto-draft' ) );
		$post = get_post( $post_id );
		if ( current_theme_supports( 'post-formats' ) && post_type_supports( $post->post_type, 'post-formats' ) && get_option( 'default_post_format' ) )
			set_post_format( $post, get_option( 'default_post_format' ) );
	} else {
		$post = new stdClass;
		$post->ID = 0;
		$post->post_author = '';
		$post->post_date = '';
		$post->post_date_gmt = '';
		$post->post_password = '';
		$post->post_name = '';
		$post->post_type = $post_type;
		$post->post_status = 'draft';
		$post->to_ping = '';
		$post->pinged = '';
		$post->comment_status = get_default_comment_status( $post_type );
		$post->ping_status = get_default_comment_status( $post_type, 'pingback' );
		$post->post_pingback = get_option( 'default_pingback_flag' );
		$post->post_category = get_option( 'default_category' );
		$post->page_template = 'default';
		$post->post_parent = 0;
		$post->menu_order = 0;
		$post = new WP_Post( $post );
	}

	/**
	 * Filters the default post content initially used in the "Write Post" form.
	 *
	 * @since WP-1.5.0
	 *
	 * @param string  $post_content Default post content.
	 * @param WP_Post $post         Post object.
	 */
	$post->post_content = apply_filters( 'default_content', $post_content, $post );

	/**
	 * Filters the default post title initially used in the "Write Post" form.
	 *
	 * @since WP-1.5.0
	 *
	 * @param string  $post_title Default post title.
	 * @param WP_Post $post       Post object.
	 */
	$post->post_title = apply_filters( 'default_title', $post_title, $post );

	/**
	 * Filters the default post excerpt initially used in the "Write Post" form.
	 *
	 * @since WP-1.5.0
	 *
	 * @param string  $post_excerpt Default post excerpt.
	 * @param WP_Post $post         Post object.
	 */
	$post->post_excerpt = apply_filters( 'default_excerpt', $post_excerpt, $post );

	return $post;
}