WordPress at a glance
function is not described

export_date_options() WP 3.1.0

Create the date options fields for exporting a given post type.

  • Global. wpdb. $wpdb WordPress database abstraction object.
  • Global. WP_Locale. $wp_locale Date and Time Locale object.

No Hooks.

Return

Nothing (null).

Usage

export_date_options( $post_type );
$post_type(string)
The post type.
Default: 'post'

Code of export date options: wp-admin/export.php WP 5.2.1

<?php
function export_date_options( $post_type = 'post' ) {
	global $wpdb, $wp_locale;

	$months = $wpdb->get_results(
		$wpdb->prepare(
			"
		SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month
		FROM $wpdb->posts
		WHERE post_type = %s AND post_status != 'auto-draft'
		ORDER BY post_date DESC
	",
			$post_type
		)
	);

	$month_count = count( $months );
	if ( ! $month_count || ( 1 == $month_count && 0 == $months[0]->month ) ) {
		return;
	}

	foreach ( $months as $date ) {
		if ( 0 == $date->year ) {
			continue;
		}

		$month = zeroise( $date->month, 2 );
		echo '<option value="' . $date->year . '-' . $month . '">' . $wp_locale->get_month( $month ) . ' ' . $date->year . '</option>';
	}
}