wordpress自带了一个日历函数get_calendar()，可以显示每天各发了哪些文章（把鼠标移到日期上即可看到），是个很实用的函数。可是它原来的式样太丑了，以至于很少有人直接使用这个函数，多数人是寻找其它的插件来实现的。其实没有必要，装太多插件会让系统变慢，而且这个自带的函数本身功能已经足够，我们需要的只是修改式样，而这可以通过直接修改原函数来实现。
get_calendar()位于/wp-includes/template-functions-general.php，代码生成html的部分都很容易懂，直接修改这些部分即可，只需要懂一些基本的html知识即可。
共享一下我修改过的get_calendar函数:
function get_calendar_ster($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" style="font-size: 11px; text-align: center; margin:0;" bgcolor="#ffffff" border="0" cellpadding="2" cellspacing="1" width="100%">
<tbody><tr style="color: rgb(51, 51, 51);" bgcolor="#ffffff">
<td colspan="2" align="left">';
if ( $previous |true ) {
echo '<a href="' .
get_month_link($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))) . '">«</a>';
} else {
echo ' ';
};
echo '</td><td align="center" colspan="3"><a href="'; echo get_settings('home'); echo '">' . $month[zeroise($thismonth, 2)] . ' ' . date('Y', $unixmonth).'</a></td>';
echo '<td align="right" colspan = "2">';
if ( $next | true) {
echo '<a href="' .
get_month_link($next->year, $next->month) . '" title="' . sprintf(__('View posts for %1$s %2$s'), $month[zeroise($next->month, 2)],
date('Y', mktime(0, 0 , 0, $next->month, 1, $next->year))) . '"> »</a>';
} else {
echo' ';
}
echo '</td></tr>';
echo '<tr style="color: rgb(255, 255, 255);" bgcolor="#2b589d">';
$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>
<tbody>
<tr style="color: rgb(51, 51, 51);" bgcolor="#E0E0E0">';
// 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('"', '"', wptexturize($ak_post_title->post_title));
else
$ak_titles_for_day["$ak_post_title->dom"] .= $ak_title_separator . str_replace('"', '"', wptexturize($ak_post_title->post_title));
}
}
// See how much we should pad in the beginning
$pad = calendar_week_mod(date('w', $unixmonth)-$week_begins);
for($ss=1; $ss<=$pad; ++$ss)
echo '<td colspan="1"> </td>';
$daysinmonth = intval(date('t', $unixmonth));
for ( $day = 1; $day <= $daysinmonth; ++$day ) {
if ( isset($newrow) && $newrow )
echo "\n\t</tr>\n\t<tr style='color: rgb(51, 51, 51);' bgcolor='#E0E0E0'>\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.'"> </td>';
echo "\n\t</tr>\n\t</tbody>\n\t</table>";
}
直接插入文件/wp-includes/template-functions-general.php即可，注意放在文件最后的”?>”之前。为了防止破坏原文件，把函数名改为了get_calendar_ster()，调用的时候使用get_calendar_ster();即可，原函数get_calendar();可继续使用。
具体效果过可见
http://zhiqiang.org/blog。
