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WordPress中用于获取文章信息以及分类链接的函数用法_php技巧

May 16, 2016 pm 08:02 PM
wordpress Classification article

get_post()(获取一篇文章)
get_post() 函数可以根据 ID 查询一篇文章的信息,还能返回循环中的当前文章。

用法

get_post( $post, $output, $filter );
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参数

$id

(整数 | 对象)(可选)文章 ID 或者文章对象,如果为空则自动设置成当前文章。

默认值:null(当前文章)

$output

(字符串)(可选)返回结果的形式,可选:

  • OBJECT:返回一个文章对象
  • ARRAY_A:返回带键值的数组
  • ARRAY_N:返回不带键值的数组
  • 默认值:OBJECT

$filter

(字符串)(可选)文章信息过滤方法。具体参考 sanitize_post_field() 函数。

默认值:row

返回值

(对象 | null | 数组)返回文章对象、数组或 null.

例子

获取 ID 为 7 的文章并打印输出它的标题:

$post_7 = get_post( 7 ); 
$title = $post_7->post_title;
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获取 ID 为 7 的文章(数组形式)并打印输出它的标题:

$post_7 = get_post( 7, ARRAY_A );
$title = $post_7['post_title'];
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其它

此函数位于:wp-includes/post.php 和 wp-includes/class-wp-atom-server.php


获取分类链接
在 WordPress 开发中,经常需要获取分类的链接。

知道分类 ID 的话只需要使用 get_category_link() 函数即可直接获取到。

但在实际情况中可能只知道一点分类信息,下边我介绍一下通过各种分类信息获取分类链接的方法。

根据分类 ID 获取分类链接

根据 ID 获取分类链接比较简单,直接使用 get_category_link() 函数即可。

echo get_category_link( 23 );

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根据分类别名获取分类链接

根据分类别名获取分类链接需要多一个步奏,先用 get_category_by_slug() 函数根据别名获取到分类,然后再获取分类链接。

echo get_category_link( get_category_by_slug( 'tips' ) );
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根据分类名获取分类链接

根据分类名获取分类链接和根据分类别名获取原理类似,都是先获取到分类,再获取链接。

echo get_category_link( get_cat_ID( 'WordPress 教程' ) );
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