╭╰Original　Colors╯╮ – 认真工作

wordpress是好物，我的大爱，啥都能做了,最近算是转型期，不知道转不转的过弯来，有用的东西先记录一下~~

1. 设定过期时间

<?php
if (have_posts()) :
while (have_posts()) : the_post(); ?>
$expirationtime = get_post_custom_values(‘expiration’);
if (is_array($expirationtime)) {
$expirestring = implode($expirationtime);}
$secondsbetween = strtotime($expirestring)-time();
if ( $secondsbetween > 0 ) {
// For example…
the_title();
the_excerpt();
}
endwhile;
endif;?>

2.区分日志显示方式

<?php if (have_posts()) :
while (have_posts()) : the_post();
$customField = get_post_custom_values(“full”);
if (isset($customField[0])) {
//Custom field is set, display a full post
the_title();
the_content();
} else {
// No custom field set, let’s display an excerpt
the_title();
the_excerpt();
endwhile;
endif;
?>

3.设定页面META内容

<meta name=”description” content=”
<?php if ( (is_home()) || (is_front_page()) ) {
echo (‘Your main description goes here’);
} elseif(is_category()) {
echo category_description();
} elseif(is_tag()) {
echo ‘-tag archive page for this blog’ . single_tag_title();
} elseif(is_month()) {
echo ‘archive page for this blog’ . the_time(‘F, Y’);
} else {
echo get_post_meta($post->ID, “Metadescription”, true);
}?>”>

4.设置特殊的CSS

<?php if (is_single()) {
$css = get_post_meta($post->ID, ‘css’, true);
if (!empty($css)) { ?>
<style type=”text/css”>
<?php echo $css; ?>
<style>
<?php }
} ?>

5. SEO Title优化

<title>
<?php if (is_home () ) {
bloginfo(‘name’);
} elseif ( is_category() ) {
single_cat_title(); echo ‘ – ‘ ; bloginfo(‘name’);
} elseif (is_single() ) {
$customField = get_post_custom_values(“title”);
if (isset($customField[0])) {
echo $customField[0];
} else {
single_post_title();
}
} elseif (is_page() ) {
bloginfo(‘name’); echo ‘: ‘; single_post_title();
} else {
wp_title(”,true);
} ?>
</title>

6.设定不被搜索引擎搜索

<?php $cf = get_post_meta($post->ID, ‘noindex’, true);
if (!empty($cf)) {
echo ‘<meta name=”robots” content=”noindex”/>’;
}
?>

7.使用缩略图（2.9+自带了）

<?php $postimageurl = get_post_meta($post->ID, ‘post-img’, true);
if ($postimageurl) {?>
<a href=”<?php the_permalink(); ?>” rel=”bookmark”>
<img src=”<?php echo $postimageurl; ?>” alt=”Post Pic” /></a>
<?php } else { ?>
<a href=”<?php the_permalink(); ?>” rel=”bookmark”>
<img src=”<?php bloginfo(‘template_url’); ?>/images/wprecipes.gif” alt=”Screenshot” /></a>
<?php } ?>

8.个性化的read more

<?php $custommore = get_post_meta($post->ID, ‘custom_more’, true); ?>
<?php if (!$custommore) { $custommore = ‘Read More &raquo;’; } ?>
<?php the_content($custommore); ?>

9.设置个性化背景（与timthumb结合）

<?php if (is_page() || is_single()) {
<?php $background = get_post_meta($post->ID, ‘background’, true);
if ($background) {?>
<style type=”text/css”>background: url(<?php bloginfo(‘template_url’); ?>/timthumb/timthumb.php?w=1920&zc=1&src=<?php echo $background; ?>) fixed no-repeat;</style>
<?php }
}?>

=========================

相关技巧

1.获取循环外的 custom field

<?php
global $wp_query;
$postid = $wp_query->post->ID;
echo get_post_meta($postid, ‘customField’, true);
?>

2.获得第一张图片

<?php
// Get URL of first image in a post
function catch_that_image() {
global $post, $posts;
$first_img = ”;
ob_start();
ob_end_clean();
$output = preg_match_all(‘/<img.+src=[\'"]([^\'"]+)[\'"].*>/i’, $post->post_content, $matches);
$first_img = $matches [1] [0];
// no image found display default image instead
if(empty($first_img)){
$first_img = “/images/default.jpg”;
}
return $first_img;
}?>

3.筛选有某一自定义值的日志

query_posts(“meta_key=Camera_Specs”);

=========================

相关插件

More Fields

Custom Shortcodes

还搜到了帕兰印象的 20+Wordpress自定义字段使用技巧和插件/Custom Fields ，可以研究下~