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详解WordPress开发中用于获取分类及子页面的函数用法_PHP

May 28, 2016 am 11:49 AM
php wordpress Classification

get_category
get_category 可能我们平时接触的不多,但却是很有用,网上这个函数介绍的貌似不多,所以今天只针对官方 WordPress 英文文档做一下翻译。

函数描述
获得指定分类,以数组或是对象的形式返回。

函数使用

 get_category( $cat, $out, $filter )
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参数描述
$cat:分类ID,或
$out返回值类型[OBJECT, ARRAY_A, or ARRAY_N]
$filter
函数返回值
这里主要讲一下对象类型的返回值,
都有注释,请自行参阅。

stdClass Object
(
  //ID 分类和标签混编
  [term_id] => 5
  //分类名
  [name] => Cat Name
  //分类别名
  [slug] => cat
  //N/A
  [term_group] => 0
  //同 term_id
  [term_taxonomy_id] => 5
  //分类法,也就是分类还是标签
  [taxonomy] => category
  //分类描述
  [description] => 
  //父级ID
  [parent] => 70
  //N/A
  [count] => 0
  //分类ID
  [cat_ID] => 5
  //N/A
  [category_count] => 0
  //同 description
  [category_description] => 
  //同 name
  [cat_name] => Category Name
  //同 slug
  [category_nicename] => category-name
  //同 parent
  [category_parent] => 70
 
)

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get_children()
再来看一下这个函数的使用。get_children 有点类似于 get_posts这个函数,但又有所不同,该函数主要用于检索或者说是返回,父文章、页面下的子文章、附件(重要),的一个函数。

希望这篇文章的一些内容解释对您有所帮助。

get_children函数意义
get_children( )该函数自 WordPress 2.0.0便开始具备,主要用于:检索附件、版本、子页面等信息。get_children( )与get_posts( )使用情况基本一致。

函数用法

$args = array(
 'post_parent' => $postid,
 'post_type' => 'attachment',
 'numberposts' => 1,
 'post_mime_type' => 'image', );
if ($images = get_children($args))
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参数解释
$args[‘numberposts']
(整数)需要检索的子文章数量。可选;默认值:-1(无限)

$args[‘post_parent']
(整数)传递日志或页面的编号以获取其子文章。传递空值可获取任意文章的子文章。可选;默认值:0 (任意父文章?)

$args[‘post_type']
(字符)文章列表中post_type列中的值,如附件,页面或修改情况;或者关键词any。默认值:any

$args[‘post_status']
(字符)文章列表中post_status列中的值,如已发布,草稿或遗传;或关键词any。默认值:any

$args[‘post_mime_type']
(字符)完全或不完全的mime类型,如图片,视频,视频/mp4,与文章的post_mime_type字段相匹配。

$output
(常量)由OBJECT, ARRAY_A, ARRAY_N中任一个函数所返回的数组项的变量类型。可选;默认值:OBJECT
总结
get_children(),一般在主题中,用于将文章内的图片附件调用出来,也就是说,只要你上传图片了,即便你的主题不支持特色图像或您没有设置特色图像,我们都可以通过该函数将您上传在该文章的图片取出,这样做虽然有一定的局限性,但作为特色图像的补充项目也已经足够了。至于取别的子项内容个人感觉用处不是很大,再就是因为一般用不到文章分页,所以也就没有做demo去测试分页。如果你正在研究get_children()这个函数,希望这篇文章能够给你带来好运。

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