WordPress/wp-includes/template-functions-general.php

<?php

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

function wp_loginout() {
	global $user_level;
	get_currentuserinfo();

	if (0 == $user_level) :
		$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>';
	endif;

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

function wp_register() {
	global $user_level;

	get_currentuserinfo();

	if (0 == $user_level && get_settings('users_can_register') ) :
		$link = '<a href="' . get_settings('siteurl') . '/wp-register.php">' . __('Register') . '</a>';
	else :
		$link = '<a href="' . get_settings('siteurl') . '/wp-admin/">' . __('Site Admin') . '</a>';
	endif;

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

function wp_meta() {
	do_action('wp_meta', 1);
}

function bloginfo($show='') {
    $info = get_bloginfo($show);
    $info = apply_filters('bloginfo', $info);
    echo convert_chars($info);
}

function bloginfo_rss($show='') {
    $info = strip_tags(get_bloginfo($show));
    echo convert_chars($info);
}

function bloginfo_unicode($show='') {
    $info = get_bloginfo($show);
    echo convert_chars($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':
		$output = get_stylesheet();
		if (empty($output) || $output == 'default') {
			$output = get_settings('siteurl') . "/wp-layout.css";
		} else {
			$output = get_settings('siteurl') . "/wp-content/themes/$output/style.css";
		}
		break;
	case 'stylesheet_directory':
		$output = get_stylesheet();
		if (empty($output) || $output == 'default') {
			$output = get_settings('siteurl');
		} else {
			$output = get_settings('siteurl') . "/wp-content/themes/$output";
		}
		break;
	case 'template_directory':
	case 'template_url':
		$output = get_template();
		if (empty($output) || $output == 'default') {
			$output = get_settings('siteurl');
		} else {
			$output = get_settings('siteurl') . "/wp-content/themes/$output";
		}
		break;
	case 'admin_email':
		$output = get_settings('admin_email');
		break;
	case 'charset':
		$output = get_settings('blog_charset');
		if ('' == $output) $output = 'UTF-8';
		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;
    global $m, $year, $monthnum, $day, $category_name, $month, $posts;

		$cat = get_query_var('cat');
		$p = get_query_var('p');
		$name = get_query_var('name');
		$category_name = get_query_var('category_name');

    // If there's a category
    if(!empty($cat)) {
        if (!stristr($cat,'-')) { // category excluded
            $title = get_the_category_by_ID($cat);
        }
    }
    if (!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'");
    }

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

    // Send it out
    if ($display && isset($title)) {
        echo " $sep $title";
    } elseif (!$display && isset($title)) {
        return " $sep $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'");
        }
        $post_data = get_postdata($p);
        $title = $post_data['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 ) {
	  $cat = get_query_var('cat');
    if(!empty($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 $m, $monthnum, $month, $year;
	if(!empty($monthnum) && !empty($year)) {
		$my_year = $year;
		$my_month = $month[$monthnum];
	} 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);
    $title_text = htmlspecialchars($text, ENT_QUOTES);

	if ('link' == $format) {
		return "\t<link rel='archives' title='$title_text' href='$url' />\n";
	} elseif ('option' == $format) {
		return "\t<option value='$url'>$text</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 $querystring_start, $querystring_equal, $querystring_separator, $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;';

    // archive link url
    $archive_link_m = get_settings('siteurl').'/'.get_settings('blogfilename').$querystring_start.'m'.$querystring_equal;    # monthly archive;
    $archive_link_w = get_settings('siteurl').'/'.get_settings('blogfilename').$querystring_start.'w'.$querystring_equal;    # weekly archive;
    $archive_link_p = get_settings('siteurl').'/'.get_settings('blogfilename').$querystring_start.'p'.$querystring_equal;    # post-by-post archive;

    // 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_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('%s %d', $month[zeroise($arcresult->month,2)], $arcresult->year);
                    $after = '&nbsp;('.$arcresult->posts.')' . $afterafter;
                } else {
                    $text = sprintf('%s %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_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("%d-%02d-%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('%s/%s%sm%s%s%sw%s%d', get_settings('home'), get_settings('blogfilename'), $querystring_start,
                                    $querystring_equal, $arc_year, $querystring_separator,
                                    $querystring_equal, $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 ID, post_date, post_title 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->ID);
                    $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;

    // Quick check. If we have no posts at all, abort!
    if (!$posts) {
        $gotsome = $wpdb->get_var("SELECT ID from $wpdb->posts WHERE post_status = 'publish' ORDER BY post_date DESC LIMIT 1");
        if (!$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') + get_settings('gmt_offset') * 3600);
        $thismonth = gmdate('m', current_time('timestamp') + get_settings('gmt_offset') * 3600);
    }

    $unixmonth = mktime(0, 0 , 0, $thismonth, 1, $thisyear);

    // Get the next and previous month and year with at least one post
    $previous = $wpdb->get_row("SELECT DISTINCT MONTH(post_date) AS month, YEAR(post_date) AS year
            FROM $wpdb->posts
            WHERE post_date < '$thisyear-$thismonth-01'
            AND post_status = 'publish'
                              ORDER BY post_date DESC
                              LIMIT 1");
    $next = $wpdb->get_row("SELECT  DISTINCT MONTH(post_date) AS month, YEAR(post_date) AS year
            FROM $wpdb->posts
            WHERE post_date >  '$thisyear-$thismonth-01'
            AND MONTH( post_date ) != MONTH( '$thisyear-$thismonth-01' )
            AND post_status = 'publish'
                              ORDER  BY post_date ASC
                              LIMIT 1");

    echo '<table id="wp-calendar">
    <caption>' . $month[zeroise($thismonth, 2)] . ' ' . date('Y', $unixmonth) . '</caption>
    <thead>
    <tr>';

    $day_abbrev = $weekday_initial;
    if ($daylength > 1) {
        $day_abbrev = $weekday_abbrev;
    }

    $myweek = array();
	
    for ($wdcount=0; $wdcount<=6; $wdcount++) {
        $myweek[]=$weekday[($wdcount+$week_begins)%7];
    }
	
    foreach ($myweek as $wd) {
        echo "\n\t\t<th abbr=\"$wd\" scope=\"col\" title=\"$wd\">" . $day_abbrev[$wd] . '</th>';
    }

    echo '
    </tr>
    </thead>

    <tfoot>
    <tr>';

    if ($previous) {
        echo "\n\t\t".'<td abbr="' . $month[zeroise($previous->month, 2)] . '" colspan="3" id="prev"><a href="' .
            get_month_link($previous->year, $previous->month) . '" title="' . sprintf(__('View posts for %1$s %2$s'), $month[zeroise($previous->month, 2)], date('Y', mktime(0, 0 , 0, $previous->month, 1, $previous->year))) . '">&laquo; ' . $month_abbrev[$month[zeroise($previous->month, 2)]] . '</a></td>';
    } else {
        echo "\n\t\t".'<td colspan="3" id="prev" class="pad">&nbsp;</td>';
    }

    echo "\n\t\t".'<td class="pad">&nbsp;</td>';

    if ($next) {
        echo "\n\t\t".'<td abbr="' . $month[zeroise($next->month, 2)] . '" colspan="3" id="next"><a href="' .
                get_month_link($next->year, $next->month) . '" title="View posts for ' . $month[zeroise($next->month, 2)] . ' ' .
                date('Y', mktime(0, 0 , 0, $next->month, 1, $next->year)) . '">' . $month_abbrev[$month[zeroise($next->month, 2)]] . ' &raquo;</a></td>';
    } else {
        echo "\n\t\t".'<td colspan="3" id="next" class="pad">&nbsp;</td>';
    }

    echo '
    </tr>
    </tfoot>

    <tbody>
    <tr>';

    // Get days with posts
    $dayswithposts = $wpdb->get_results("SELECT DISTINCT DAYOFMONTH(post_date)
            FROM $wpdb->posts WHERE MONTH(post_date) = $thismonth
            AND YEAR(post_date) = $thisyear
            AND post_status = 'publish'
            AND post_date < '" . current_time('mysql') . '\'', ARRAY_N);
    if ($dayswithposts) {
        foreach ($dayswithposts as $daywith) {
            $daywithpost[] = $daywith[0];
        }
    } else {
        $daywithpost = array();
    }



    if (strstr($_SERVER['HTTP_USER_AGENT'], 'MSIE') ||
          strstr(strtolower($_SERVER['HTTP_USER_AGENT']), 'camino') ||
          strstr(strtolower($_SERVER['HTTP_USER_AGENT']), 'safari')) {
        $ak_title_separator = "\n";
    } else {
        $ak_title_separator = ', ';
    }

    $ak_titles_for_day = array();
    $ak_post_titles = $wpdb->get_results("SELECT post_title, DAYOFMONTH(post_date) as dom "
                                         ."FROM $wpdb->posts "
                                         ."WHERE YEAR(post_date) = '$thisyear' "
                                         ."AND MONTH(post_date) = '$thismonth' "
                                         ."AND post_date < '".current_time('mysql')."' "
                                         ."AND post_status = 'publish'"
                                        );
    if ($ak_post_titles) {
        foreach ($ak_post_titles as $ak_post_title) {
            if (empty($ak_titles_for_day['day_'.$ak_post_title->dom])) {
                $ak_titles_for_day['day_'.$ak_post_title->dom] = '';
            }
            if (empty($ak_titles_for_day["$ak_post_title->dom"])) { // first one
                $ak_titles_for_day["$ak_post_title->dom"] = str_replace('"', '&quot;', wptexturize($ak_post_title->post_title));
            } else {
                $ak_titles_for_day["$ak_post_title->dom"] .= $ak_title_separator . str_replace('"', '&quot;', wptexturize($ak_post_title->post_title));
            }
        }
    }


    // See how much we should pad in the beginning
    $pad = calendar_week_mod(date('w', $unixmonth)-$week_begins);
    if (0 != $pad) echo "\n\t\t".'<td colspan="'.$pad.'" class="pad">&nbsp;</td>';

    $daysinmonth = intval(date('t', $unixmonth));
    for ($day = 1; $day <= $daysinmonth; ++$day) {
        if (isset($newrow) && $newrow)
            echo "\n\t</tr>\n\t<tr>\n\t\t";
        $newrow = false;

        if ($day == gmdate('j', (time() + (get_settings('gmt_offset') * 3600))) && $thismonth == gmdate('m', time()+(get_settings('gmt_offset') * 3600)) && $thisyear == gmdate('Y', time()+(get_settings('gmt_offset') * 3600)))
            echo '<td id="today">';
        else
            echo '<td>';

        if (in_array($day, $daywithpost)) { // any posts today?
            echo '<a href="' . get_day_link($thisyear, $thismonth, $day) . "\" title=\"$ak_titles_for_day[$day]\">$day</a>";
        } else {
            echo $day;
        }
        echo '</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 && $pad != 7)
        echo "\n\t\t".'<td class="pad" colspan="'.$pad.'">&nbsp;</td>';

    echo "\n\t</tr>\n\t</tbody>\n\t</table>";
}

function allowed_tags() {
    global $allowedtags;
	$allowed = '';
    foreach($allowedtags as $tag => $attributes) {
        $allowed .= '<'.$tag;
        if (0 < count($attributes)) {
            foreach ($attributes as $attribute => $limits) {
                $allowed .= ' '.$attribute.'=""';
            }
        }
        $allowed .= '> ';
    }
    return htmlentities($allowed);
}

/***** Date/Time tags *****/

function the_date_xml() {
    global $post;
    echo mysql2date('Y-m-d', $post->post_date);
    //echo ""+$post->post_date;
}

function the_date($d='', $before='', $after='', $echo = true) {
    global $id, $post, $day, $previousday, $newday;
    $the_date = '';
    if ($day != $previousday) {
        $the_date .= $before;
        if ($d=='') {
	    $the_date .= mysql2date(get_settings('date_format'), $post->post_date);
        } else {
	    $the_date .= mysql2date($d, $post->post_date);
        }
        $the_date .= $after;
        $previousday = $day;
    }
    $the_date = apply_filters('the_date', $the_date);
    if ($echo) {
        echo $the_date;
    } else {
        return $the_date;
    }
}

function the_time($d='', $echo = true) {
    global $id, $post;
    if ($d=='') {
        $the_time = mysql2date(get_settings('time_format'), $post->post_date);
    } else {
        $the_time = mysql2date($d, $post->post_date);
    }
    $the_time = apply_filters('the_time', $the_time);
    if ($echo) {
        echo $the_time;
    } else {
        return $the_time;
    }
}

function the_weekday() {
    global $weekday, $id, $post;
    $the_weekday = $weekday[mysql2date('w', $post->post_date)];
    $the_weekday = apply_filters('the_weekday', $the_weekday);
    echo $the_weekday;
}

function the_weekday_date($before='',$after='') {
    global $weekday, $id, $post, $day, $previousweekday;
    $the_weekday_date = '';
    if ($day != $previousweekday) {
        $the_weekday_date .= $before;
        $the_weekday_date .= $weekday[mysql2date('w', $post->post_date)];
        $the_weekday_date .= $after;
        $previousweekday = $day;
    }
    $the_weekday_date = apply_filters('the_weekday_date', $the_weekday_date);
    echo $the_weekday_date;
}

?>