get_calendar

Source code

function get_calendar($initial = true, $echo = true) {

	global $wpdb, $m, $monthnum, $year, $wp_locale, $posts;



	$cache = array();

	$key = md5( $m . $monthnum . $year );

	if ( $cache = wp_cache_get( 'get_calendar', 'calendar' ) ) {

		if ( is_array($cache) && isset( $cache[ $key ] ) ) {

			if ( $echo ) {

				echo apply_filters( 'get_calendar',  $cache[$key] );

				return;

			} else {

				return apply_filters( 'get_calendar',  $cache[$key] );

			}

		}

	}



	if ( !is_array($cache) )

		$cache = array();



	// Quick check. If we have no posts at all, abort!

	if ( !$posts ) {

		$gotsome = $wpdb->get_var("SELECT 1 as test FROM $wpdb->posts WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1");

		if ( !$gotsome ) {

			$cache[ $key ] = '';

			wp_cache_set( 'get_calendar', $cache, 'calendar' );

			return;

		}

	}



	if ( isset($_GET['w']) )

		$w = ''.intval($_GET['w']);



	// week_begins = 0 stands for Sunday

	$week_begins = intval(get_option('start_of_week'));



	// Let's figure out when we are

	if ( !empty($monthnum) && !empty($year) ) {

		$thismonth = ''.zeroise(intval($monthnum), 2);

		$thisyear = ''.intval($year);

	} elseif ( !empty($w) ) {

		// We need to get the month from MySQL

		$thisyear = ''.intval(substr($m, 0, 4));

		$d = (($w - 1) * 7) + 6; //it seems MySQL's weeks disagree with PHP's

		$thismonth = $wpdb->get_var("SELECT DATE_FORMAT((DATE_ADD('{$thisyear}0101', INTERVAL $d DAY) ), '%m')");

	} elseif ( !empty($m) ) {