按字母顺序获取自定义字段值 [英] Get custom field values in alphabetical order

问题描述

下面的函数按发布顺序列出自定义字段的值.例如:

The function below lists the values ​​of a custom field in the order they are posted. example:

• 弗兰克·卡普拉
• 希区柯克(Alfred Hitchcock)
• 伍迪·艾伦
• 伍迪·艾伦
• 弗兰克·卡普拉
• PedroAlmodóvar

我想按字母顺序且不重复的方式获取此列表，并带有指向每个项目<a href="Woody-Allen">Woody Allen</a>的链接.例如:

I'd like to get this list in alphabetical order and without repetition, with a link to each item <a href="Woody-Allen">Woody Allen</a>. example:

• 希区柯克(Alfred Hitchcock)
• 弗兰克·卡普拉
• PedroAlmodóvar
• 伍迪·艾伦

这是代码:

<?php
$movie_reviews = get_posts( 'numberposts=-1&orderby=post_name' );
foreach( $movie_reviews as $post ) : setup_postdata( $post );
?>
<span>
<?php $director = get_post_meta( $post->ID, "director", $single = true );
if( $director !== '' ) {
echo $director;
} ?>
</span>
<?php endforeach; ?>

这可能吗?

推荐答案

使用 get_posts ，您可以像这样用meta_value订购帖子:

$movie_reviews = get_posts(array(
  'numberposts'=>-1,
  'order'=>'ASC',
  'orderby'=>'meta_value',
  'meta_key'=>'director'
));

要删除重复项，您可以构建一系列控制器:

To remove duplicates, you can build an array of directors :

$directors = array();
foreach( $movie_reviews as $post ) {
    $director = get_post_meta( $post->ID, 'director', true );
}
$directors = array_unique($directors);

然后您可以根据需要显示它们:

And after you can display them as you want :

foreach ($directors as $director) {
    // display what you want
}

编辑:仅显示a *导演:

EDIT : To display only a* directors :

foreach ($directors as $director) {
    if (strtolower($director[0])=='a') {
        // display what you want
    }
}

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