root/branches/2.0/wp-includes/template-functions-general.php

<?php

/* Note: these tags go anywhere in the template */

function get_header() {
    if ( file_exists( TEMPLATEPATH . '/header.php') )
        load_template( TEMPLATEPATH . '/header.php');
    else
        load_template( ABSPATH . 'wp-content/themes/default/header.php');
}


function get_footer() {
    if ( file_exists( TEMPLATEPATH . '/footer.php') )
        load_template( TEMPLATEPATH . '/footer.php');
    else
        load_template( ABSPATH . 'wp-content/themes/default/footer.php');
}


function get_sidebar() {
    if ( file_exists( TEMPLATEPATH . '/sidebar.php') )
        load_template( TEMPLATEPATH . '/sidebar.php');
    else
        load_template( ABSPATH . 'wp-content/themes/default/sidebar.php');
}


function wp_loginout() {
    if ( ! is_user_logged_in() )
        $link = '<a href="' . get_settings('siteurl') . '/wp-login.php">' . __('Login') . '</a>';
    else
        $link = '<a href="' . get_settings('siteurl') . '/wp-login.php?action=logout">' . __('Logout') . '</a>';

    echo apply_filters('loginout', $link);
}


function wp_register( $before = '<li>', $after = '</li>' ) {

    if ( ! is_user_logged_in() ) {
        if ( get_settings('users_can_register') )
            $link = $before . '<a href="' . get_settings('siteurl') . '/wp-register.php">' . __('Register') . '</a>' . $after;
        else
            $link = '';
    } else {
        $link = $before . '<a href="' . get_settings('siteurl') . '/wp-admin/">' . __('Site Admin') . '</a>' . $after;
    }

    echo apply_filters('register', $link);
}


function wp_meta() {
    do_action('wp_meta');
}


function bloginfo($show='') {
    $info = get_bloginfo($show);
    if (!strstr($show, 'url') && //don't filter URLs
        !strstr($show, 'directory') &&
        !strstr($show, 'home')) {
        $info = apply_filters('bloginfo', $info, $show);
        $info = convert_chars($info);
    } else {
        $info = apply_filters('bloginfo_url', $info, $show);
    }

    echo $info;
}


function get_bloginfo($show='') {

    switch($show) {
        case 'url' :
        case 'home' :
        case 'siteurl' :
            $output = get_settings('home');
            break;
        case 'wpurl' :
            $output = get_settings('siteurl');
            break;
        case 'description':
            $output = get_settings('blogdescription');
            break;
        case 'rdf_url':
            $output = get_feed_link('rdf');
            break;
        case 'rss_url':
            $output = get_feed_link('rss');
            break;
        case 'rss2_url':
            $output = get_feed_link('rss2');
            break;
        case 'atom_url':
            $output = get_feed_link('atom');
            break;
        case 'comments_rss2_url':
            $output = get_feed_link('comments_rss2');
            break;
        case 'pingback_url':
            $output = get_settings('siteurl') .'/xmlrpc.php';
            break;
        case 'stylesheet_url':
            $output = get_stylesheet_uri();
            break;
        case 'stylesheet_directory':
            $output = get_stylesheet_directory_uri();
            break;
        case 'template_directory':
        case 'template_url':
            $output = get_template_directory_uri();
            break;
        case 'admin_email':
            $output = get_settings('admin_email');
            break;
        case 'charset':
            $output = get_settings('blog_charset');
            if ('' == $output) $output = 'UTF-8';
            break;
        case 'html_type' :
            $output = get_option('html_type');
            break;
        case 'version':
            global $wp_version;
            $output = $wp_version;
            break;
        case 'name':
        default:
            $output = get_settings('blogname');
            break;
    }
    return $output;
}


function wp_title($sep = '&raquo;', $display = true) {
    global $wpdb, $posts, $month;

    $cat = get_query_var('cat');
    $p = get_query_var('p');
    $name = get_query_var('name');
    $category_name = get_query_var('category_name');
    $author = get_query_var('author');
    $author_name = get_query_var('author_name');
    $m = (int) get_query_var('m');
    $year = (int) get_query_var('year');
    $monthnum = (int) get_query_var('monthnum');
    $day = (int) get_query_var('day');
    $title = '';

    // If there's a category
    if ( !empty($cat) ) {
            // category exclusion
            if ( !stristr($cat,'-') )
                $title = apply_filters('single_cat_title', get_the_category_by_ID($cat));
    } elseif ( !empty($category_name) ) {
        if ( stristr($category_name,'/') ) {
                $category_name = explode('/',$category_name);
                if ( $category_name[count($category_name)-1] )
                    $category_name = $category_name[count($category_name)-1]; // no trailing slash
                else
                    $category_name = $category_name[count($category_name)-2]; // there was a trailling slash
        }
        $title = $wpdb->get_var("SELECT cat_name FROM $wpdb->categories WHERE category_nicename = '$category_name'");
        $title = apply_filters('single_cat_title', $title);
    }

    // If there's an author
    if ( !empty($author) ) {
        $title = get_userdata($author);
        $title = $title->display_name;
    }
    if ( !empty($author_name) ) {
        // We do a direct query here because we don't cache by nicename.
        $title = $wpdb->get_var("SELECT display_name FROM $wpdb->users WHERE user_nicename = '$author_name'");
    }

    // If there's a month
    if ( !empty($m) ) {
        $my_year = substr($m, 0, 4);
        $my_month = $month[substr($m, 4, 2)];
        $title = "$my_year $sep $my_month";
    }

    if ( !empty($year) ) {
        $title = $year;
        if ( !empty($monthnum) )
            $title .= " $sep ".$month[zeroise($monthnum, 2)];
        if ( !empty($day) )
            $title .= " $sep ".zeroise($day, 2);
    }

    // If there is a post
    if ( is_single() || is_page() ) {
        $title = strip_tags($posts[0]->post_title);
        $title = apply_filters('single_post_title', $title);
    }

    $prefix = '';
    if ( !empty($title) )
        $prefix = " $sep ";

    $title = $prefix . $title;
    $title = apply_filters('wp_title', $title, $sep);

    // Send it out
    if ( $display )
        echo $title;
    else
        return $title;
}


function single_post_title($prefix = '', $display = true) {
    global $wpdb;
    $p = get_query_var('p');
    $name = get_query_var('name');

    if ( intval($p) || '' != $name ) {
        if ( !$p )
            $p = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_name = '$name'");
        $post = & get_post($p);
        $title = $post->post_title;
        $title = apply_filters('single_post_title', $title);
        if ( $display )
            echo $prefix.strip_tags($title);
        else
            return strip_tags($title);
    }
}


function single_cat_title($prefix = '', $display = true ) {
    $cat = intval( get_query_var('cat') );
    if ( !empty($cat) && !(strtoupper($cat) == 'ALL') ) {
        $my_cat_name = get_the_category_by_ID($cat);
        if ( !empty($my_cat_name) ) {
            if ( $display )
                echo $prefix.strip_tags($my_cat_name);
            else
                return strip_tags($my_cat_name);
        }
    }
}


function single_month_title($prefix = '', $display = true ) {
    global $month;

    $m = (int) get_query_var('m');
    $year = (int) get_query_var('year');
    $monthnum = (int) get_query_var('monthnum');

    if ( !empty($monthnum) && !empty($year) ) {
        $my_year = $year;
        $my_month = $month[str_pad($monthnum, 2, '0', STR_PAD_LEFT)];
    } elseif ( !empty($m) ) {
        $my_year = substr($m, 0, 4);
        $my_month = $month[substr($m, 4, 2)];
    }

    if ( !empty($my_month) && $display )
        echo $prefix . $my_month . $prefix . $my_year;
    else
        return $monthnum;
}


/* link navigation hack by Orien http://icecode.com/ */
function get_archives_link($url, $text, $format = 'html', $before = '', $after = '') {
    $text = wptexturize($text);
    $title_text = attribute_escape($text);

    if ('link' == $format)
        return "\t<link rel='archives' title='$title_text' href='$url' />\n";
    elseif ('option' == $format)
        return "\t<option value='$url'>$before $text $after</option>\n";
    elseif ('html' == $format)
        return "\t<li>$before<a href='$url' title='$title_text'>$text</a>$after</li>\n";
    else // custom
        return "\t$before<a href='$url' title='$title_text'>$text</a>$after\n";
}


function wp_get_archives($args = '') {
    parse_str($args, $r);
    if ( !isset($r['type']) )
        $r['type'] = '';
    if ( !isset($r['limit']) )
        $r['limit'] = '';
    if ( !isset($r['format']) )
        $r['format'] = 'html';
    if ( !isset($r['before']) )
        $r['before'] = '';
    if ( !isset($r['after']) )
        $r['after'] = '';
    if ( !isset($r['show_post_count']) )
        $r['show_post_count'] = false;

    get_archives($r['type'], $r['limit'], $r['format'], $r['before'], $r['after'], $r['show_post_count']);
}


function get_archives($type='', $limit='', $format='html', $before = '', $after = '', $show_post_count = false) {
    global $month, $wpdb;

    if ( '' == $type )
        $type = 'monthly';

    if ( '' != $limit ) {
        $limit = (int) $limit;
        $limit = ' LIMIT '.$limit;
    }
    // this is what will separate dates on weekly archive links
    $archive_week_separator = '&#8211;';

    // over-ride general date format ? 0 = no: use the date format set in Options, 1 = yes: over-ride
    $archive_date_format_over_ride = 0;

    // options for daily archive (only if you over-ride the general date format)
    $archive_day_date_format = 'Y/m/d';

    // options for weekly archive (only if you over-ride the general date format)
    $archive_week_start_date_format = 'Y/m/d';
    $archive_week_end_date_format    = 'Y/m/d';

    if ( !$archive_date_format_over_ride ) {
        $archive_day_date_format = get_settings('date_format');
        $archive_week_start_date_format = get_settings('date_format');
        $archive_week_end_date_format = get_settings('date_format');
    }

    $add_hours = intval(get_settings('gmt_offset'));
    $add_minutes = intval(60 * (get_settings('gmt_offset') - $add_hours));

    $now = current_time('mysql');

    if ( 'monthly' == $type ) {
        $arcresults = $wpdb->get_results("SELECT DISTINCT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, count(ID) as posts FROM $wpdb->posts WHERE post_date < '$now' AND post_date != '0000-00-00 00:00:00' AND post_status = 'publish' GROUP BY YEAR(post_date), MONTH(post_date) ORDER BY post_date DESC" . $limit);
        if ( $arcresults ) {
            $afterafter = $after;
            foreach ( $arcresults as $arcresult ) {
                $url    = get_month_link($arcresult->year,    $arcresult->month);
                if ( $show_post_count ) {
                    $text = sprintf(__('%1$s %2$d'), $month[zeroise($arcresult->month,2)], $arcresult->year);
                    $after = '&nbsp;('.$arcresult->posts.')' . $afterafter;
                } else {
                    $text = sprintf(__('%1$s %2$d'), $month[zeroise($arcresult->month,2)], $arcresult->year);
                }
                echo get_archives_link($url, $text, $format, $before, $after);
            }
        }
    } elseif ( 'daily' == $type ) {
        $arcresults = $wpdb->get_results("SELECT DISTINCT YEAR(post_date) AS `year`, MONTH(post_date) AS `month`, DAYOFMONTH(post_date) AS `dayofmonth` FROM $wpdb->posts WHERE post_date < '$now' AND post_date != '0000-00-00 00:00:00' AND post_status = 'publish' ORDER BY post_date DESC" . $limit);
        if ( $arcresults ) {
            foreach ( $arcresults as $arcresult ) {
                $url    = get_day_link($arcresult->year, $arcresult->month, $arcresult->dayofmonth);
                $date = sprintf('%1$d-%2$02d-%3$02d 00:00:00', $arcresult->year, $arcresult->month, $arcresult->dayofmonth);
                $text = mysql2date($archive_day_date_format, $date);
                echo get_archives_link($url, $text, $format, $before, $after);
            }
        }
    } elseif ( 'weekly' == $type ) {
        $start_of_week = get_settings('start_of_week');
        $arcresults = $wpdb->get_results("SELECT DISTINCT WEEK(post_date, $start_of_week) AS `week`, YEAR(post_date) AS yr, DATE_FORMAT(post_date, '%Y-%m-%d') AS yyyymmdd FROM $wpdb->posts WHERE post_date < '$now' AND post_status = 'publish' ORDER BY post_date DESC" . $limit);
        $arc_w_last = '';
        if ( $arcresults ) {
                foreach ( $arcresults as $arcresult ) {
                    if ( $arcresult->week != $arc_w_last ) {
                        $arc_year = $arcresult->yr;
                        $arc_w_last = $arcresult->week;
                        $arc_week = get_weekstartend($arcresult->yyyymmdd, get_settings('start_of_week'));
                        $arc_week_start = date_i18n($archive_week_start_date_format, $arc_week['start']);
                        $arc_week_end = date_i18n($archive_week_end_date_format, $arc_week['end']);
                        $url  = sprintf('%1$s/%2$s%3$sm%4$s%5$s%6$sw%7$s%8$d', get_settings('home'), '', '?', '=', $arc_year, '&amp;', '=', $arcresult->week);
                        $text = $arc_week_start . $archive_week_separator . $arc_week_end;
                        echo get_archives_link($url, $text, $format, $before, $after);
                    }
                }
        }
    } elseif ( 'postbypost' == $type ) {
        $arcresults = $wpdb->get_results("SELECT * FROM $wpdb->posts WHERE post_date < '$now' AND post_status = 'publish' ORDER BY post_date DESC" . $limit);
        if ( $arcresults ) {
            foreach ( $arcresults as $arcresult ) {
                if ( $arcresult->post_date != '0000-00-00 00:00:00' ) {
                    $url  = get_permalink($arcresult);
                    $arc_title = $arcresult->post_title;
                    if ( $arc_title )
                        $text = strip_tags($arc_title);
                    else
                        $text = $arcresult->ID;
                    echo get_archives_link($url, $text, $format, $before, $after);
                }
            }
        }
    }
}


// Used in get_calendar
function calendar_week_mod($num) {
    $base = 7;
    return ($num - $base*floor($num/$base));
}


function get_calendar($daylength = 1) {
    global $wpdb, $m, $monthnum, $year, $timedifference, $month, $month_abbrev, $weekday, $weekday_initial, $weekday_abbrev, $posts;

    $now = current_time('mysql');

    // Quick check. If we have no posts yet published, abort!
    if ( !$posts ) {
        $gotsome = $wpdb->get_var("SELECT ID from $wpdb->posts WHERE post_status = 'publish' AND post_date < '$now' ORDER BY post_date DESC LIMIT 1");
        if ( !$gotsome )
            return;
    }

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

    // week_begins = 0 stands for Sunday
    $week_begins = intval(get_settings('start_of_week'));
    $add_hours = intval(get_settings('gmt_offset'));
    $add_minutes = intval(60 * (get_settings('gmt_offset') - $add_hours));

    // 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) ) {
        $calendar = substr($m, 0, 6);
        $thisyear = ''.intval(substr($m, 0, 4));
        if ( strlen($m) < 6 )
                $thismonth = '01';
        else
                $thismonth = ''.zeroise(intval(substr($m, 4, 2)), 2);
    } else {
        $thisyear = gmdate('Y', current_time('timestamp'));