检索文章的写作时间。

function get_the_time( $format = '', $post = null ) {
	$post = get_post( $post );

	if ( ! $post ) {
		return false;
	}

	$_format = ! empty( $format ) ? $format : get_option( 'time_format' );

	$the_time = get_post_time( $_format, false, $post, true );

	/**
	 * Filters the time a post was written.
	 *
	 * @since 1.5.0
	 *
	 * @param string|int  $the_time Formatted date string or Unix timestamp if `$format` is 'U' or 'G'.
	 * @param string      $format   Format to use for retrieving the time the post
	 *                              was written. Accepts 'G', 'U', or PHP date format.
	 * @param WP_Post     $post     Post object.
	 */
	return apply_filters( 'get_the_time', $the_time, $format, $post );
}