Defined (1)

The function is defined in the following location(s).

/wp-includes/general-template.php  

function get_calendar( $initial = true, $echo = true ) { 
    global $wpdb, $m, $monthnum, $year, $wp_locale, $posts; 
 
    $key = md5( $m . $monthnum . $year ); 
    $cache = wp_cache_get( 'get_calendar', 'calendar' ); 
 
    if ( $cache && is_array( $cache ) && isset( $cache[ $key ] ) ) { 
        /** This filter is documented in wp-includes/general-template.php */ 
        $output = apply_filters( 'get_calendar', $cache[ $key ] ); 
 
        if ( $echo ) { 
            echo $output; 
            return; 
        } 
 
        return $output; 
    } 
 
    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 = (int) $_GET['w']; 
    } 
    // week_begins = 0 stands for Sunday 
    $week_begins = (int) get_option( 'start_of_week' ); 
    $ts = current_time( 'timestamp' ); 
 
    // Let's figure out when we are 
    if ( ! empty( $monthnum ) && ! empty( $year ) ) { 
        $thismonth = zeroise( intval( $monthnum ), 2 ); 
        $thisyear = (int) $year; 
    } elseif ( ! empty( $w ) ) { 
        // We need to get the month from MySQL 
        $thisyear = (int) substr( $m, 0, 4 ); 
        //it seems MySQL's weeks disagree with PHP's 
        $d = ( ( $w - 1 ) * 7 ) + 6; 
        $thismonth = $wpdb->get_var("SELECT DATE_FORMAT((DATE_ADD('{$thisyear}0101', INTERVAL $d DAY) ), '%m')"); 
    } elseif ( ! empty( $m ) ) { 
        $thisyear = (int) substr( $m, 0, 4 ); 
        if ( strlen( $m ) < 6 ) { 
            $thismonth = '01'; 
        } else { 
            $thismonth = zeroise( (int) substr( $m, 4, 2 ), 2 ); 
        } 
    } else { 
        $thisyear = gmdate( 'Y', $ts ); 
        $thismonth = gmdate( 'm', $ts ); 
    } 
 
    $unixmonth = mktime( 0, 0 , 0, $thismonth, 1, $thisyear ); 
    $last_day = date( 't', $unixmonth ); 
 
    // Get the next and previous month and year with at least one post 
    $previous = $wpdb->get_row("SELECT MONTH(post_date) AS month, YEAR(post_date) AS year 
        FROM $wpdb->posts 
        WHERE post_date < '$thisyear-$thismonth-01' 
        AND post_type = 'post' AND post_status = 'publish' 
            ORDER BY post_date DESC 
            LIMIT 1"); 
    $next = $wpdb->get_row("SELECT MONTH(post_date) AS month, YEAR(post_date) AS year 
        FROM $wpdb->posts 
        WHERE post_date > '$thisyear-$thismonth-{$last_day} 23:59:59' 
        AND post_type = 'post' AND post_status = 'publish' 
            ORDER BY post_date ASC 
            LIMIT 1"); 
 
    /** translators: Calendar caption: 1: month name, 2: 4-digit year */ 
    $calendar_caption = _x('%1$s %2$s', 'calendar caption'); 
    $calendar_output = '<table id="wp-calendar"> 
    <caption>' . sprintf( 
        $calendar_caption,  
        $wp_locale->get_month( $thismonth ),  
        date( 'Y', $unixmonth ) 
 ) . '</caption> 
    <thead> 
    <tr>'; 
 
    $myweek = array(); 
 
    for ( $wdcount = 0; $wdcount <= 6; $wdcount++ ) { 
        $myweek[] = $wp_locale->get_weekday( ( $wdcount + $week_begins ) % 7 ); 
    } 
 
    foreach ( $myweek as $wd ) { 
        $day_name = $initial ? $wp_locale->get_weekday_initial( $wd ) : $wp_locale->get_weekday_abbrev( $wd ); 
        $wd = esc_attr( $wd ); 
        $calendar_output .= "\n\t\t<th scope=\"col\" title=\"$wd\">$day_name</th>"; 
    } 
 
    $calendar_output .= ' 
    </tr> 
    </thead> 
 
    <tfoot> 
    <tr>'; 
 
    if ( $previous ) { 
        $calendar_output .= "\n\t\t".'<td colspan="3" id="prev"><a href="' . get_month_link( $previous->year, $previous->month ) . '">« ' . 
            $wp_locale->get_month_abbrev( $wp_locale->get_month( $previous->month ) ) . 
        '</a></td>'; 
    } else { 
        $calendar_output .= "\n\t\t".'<td colspan="3" id="prev" class="pad"> </td>'; 
    } 
 
    $calendar_output .= "\n\t\t".'<td class="pad"> </td>'; 
 
    if ( $next ) { 
        $calendar_output .= "\n\t\t".'<td colspan="3" id="next"><a href="' . get_month_link( $next->year, $next->month ) . '">' . 
            $wp_locale->get_month_abbrev( $wp_locale->get_month( $next->month ) ) . 
        ' »</a></td>'; 
    } else { 
        $calendar_output .= "\n\t\t".'<td colspan="3" id="next" class="pad"> </td>'; 
    } 
 
    $calendar_output .= ' 
    </tr> 
    </tfoot> 
 
    <tbody> 
    <tr>'; 
 
    $daywithpost = array(); 
 
    // Get days with posts 
    $dayswithposts = $wpdb->get_results("SELECT DISTINCT DAYOFMONTH(post_date) 
        FROM $wpdb->posts WHERE post_date >= '{$thisyear}-{$thismonth}-01 00:00:00' 
        AND post_type = 'post' AND post_status = 'publish' 
        AND post_date <= '{$thisyear}-{$thismonth}-{$last_day} 23:59:59'", ARRAY_N); 
    if ( $dayswithposts ) { 
        foreach ( (array) $dayswithposts as $daywith ) { 
            $daywithpost[] = $daywith[0]; 
        } 
    } 
 
    // See how much we should pad in the beginning 
    $pad = calendar_week_mod( date( 'w', $unixmonth ) - $week_begins ); 
    if ( 0 != $pad ) { 
        $calendar_output .= "\n\t\t".'<td colspan="'. esc_attr( $pad ) .'" class="pad"> </td>'; 
    } 
 
    $newrow = false; 
    $daysinmonth = (int) date( 't', $unixmonth ); 
 
    for ( $day = 1; $day <= $daysinmonth; ++$day ) { 
        if ( isset($newrow) && $newrow ) { 
            $calendar_output .= "\n\t</tr>\n\t<tr>\n\t\t"; 
        } 
        $newrow = false; 
 
        if ( $day == gmdate( 'j', $ts ) && 
            $thismonth == gmdate( 'm', $ts ) && 
            $thisyear == gmdate( 'Y', $ts ) ) { 
            $calendar_output .= '<td id="today">'; 
        } else { 
            $calendar_output .= '<td>'; 
        } 
 
        if ( in_array( $day, $daywithpost ) ) { 
            // any posts today? 
            $date_format = date( _x( 'F j, Y', 'daily archives date format' ), strtotime( "{$thisyear}-{$thismonth}-{$day}" ) ); 
            /** translators: Post calendar label. 1: Date */ 
            $label = sprintf( __( 'Posts published on %s' ), $date_format ); 
            $calendar_output .= sprintf( 
                '<a href="%s" aria-label="%s">%s</a>',  
                get_day_link( $thisyear, $thismonth, $day ),  
                esc_attr( $label ),  
                $day 
 ); 
        } else { 
            $calendar_output .= $day; 
        } 
        $calendar_output .= '</td>'; 
 
        if ( 6 == calendar_week_mod( date( 'w', mktime(0, 0 , 0, $thismonth, $day, $thisyear ) ) - $week_begins ) ) { 
            $newrow = true; 
        } 
    } 
 
    $pad = 7 - calendar_week_mod( date( 'w', mktime( 0, 0 , 0, $thismonth, $day, $thisyear ) ) - $week_begins ); 
    if ( $pad != 0 && $pad != 7 ) { 
        $calendar_output .= "\n\t\t".'<td class="pad" colspan="'. esc_attr( $pad ) .'"> </td>'; 
    } 
    $calendar_output .= "\n\t</tr>\n\t</tbody>\n\t</table>"; 
 
    $cache[ $key ] = $calendar_output; 
    wp_cache_set( 'get_calendar', $cache, 'calendar' ); 
 
    if ( $echo ) { 
        /** 
         * Filters the HTML calendar output. 
         * 
         * @since 3.0.0 
         * 
         * @param string $calendar_output HTML output of the calendar. 
         */ 
        echo apply_filters( 'get_calendar', $calendar_output ); 
        return; 
    } 
    /** This filter is documented in wp-includes/general-template.php */ 
    return apply_filters( 'get_calendar', $calendar_output ); 
}