A detailed description of the function usage in WordPress development for obtaining classification and sub-pages, wordpress_php tutorial

In the WordPress development to obtain the classification and sub-page function usage, detailed WordPress

Get_category
Get_category may we usually touch not much, but it is very useful, the function of the online description of the seemingly few, so today only for the official WordPress English document translation.

Function description
Gets the specified classification, returned as an array or as an object.

function uses

Get_category ($cat, $out, $filter)

Parameter description
$CAT: Category ID, or
$out return value type [OBJECT, Array_a, or Array_n]
$filter
function return value
This is mainly about the return value of the object type,
Have comments, please refer to them yourself.

StdClass Object (  //id Classification and label mixed  [term_id] + 5  //category name  [name] = + Cat name  //category alias  [slug] = > Cat  //n/a  [Term_group] + 0  //same term_id  [term_taxonomy_id] + 5  //taxonomy, i.e. category or label  [Taxonomy] = category  //Description  [description] +   //parent ID [parent  ] =  //n/a  [Count] + 0  //category ID  [cat_id] = 5  //n/a  [Category_count] + 0  //Same as Description  [Category_description] =   //same name  [cat_name] = category name  //Same as Slug  [category_ Nicename] = Category-name  //with parent  [category_parent] + 70)

Get_children ()
Let's take a look at the use of this function. Get_children is somewhat similar to the get_posts function, but different, the function is mainly used to retrieve or return, the parent article, the page under the Cong Wenzhang, attachment (important), a function.

I hope some of the content in this article will help you.

Get_children function meaning
Get_children () This function from the WordPress 2.0.0 began to have, mainly for: Retrieving attachments, versions, sub-pages and other information. The use of Get_children () and get_posts () is basically the same.

function usage

$args = Array (' post_parent ' = = $postid, ' post_type ' = ' attachment ', ' numberposts ' = 1, ' post_mime_type ' = ' Image ',); if ($images = Get_children ($args))

Parameter interpretation
$args [' numberposts ']
(integer) The number of child articles that need to be retrieved. Optional; Default value: 1 (unlimited)

$args [' Post_parent ']
(integer) passes the number of the journal or page to get its child articles. Pass null values to get the child articles of any article. Optional; Default value: 0 (any parent article?) ）

$args [' Post_type ']
(character) The value in the Post_type column in the list of articles, such as attachments, pages, or modifications, or any of the keywords. Default value: Any

$args [' Post_status ']
(character) The value in the Post_status column in the list of articles, such as published, draft, or inherited, or keyword any. Default value: Any

$args [' Post_mime_type ']
(character) Full or incomplete MIME type, slice, video, video/mp4, matches the Post_mime_type field of the article.

$output
(constant) The variable type of an array item returned by any function in object, Array_a, Array_n. Optional; Default value: OBJECT
Summarize
Get_children (), generally in the subject, used to call the picture attachment in the article, that is, as long as you upload the image, even if your theme does not support the featured image or you do not set a featured image, we can use this function to upload the picture you uploaded in the article, Although this has some limitations, it is sufficient to complement the featured image. As for the other children of the content of the personal feeling is not very useful, and then because the general use of the article is not paged, so there is no demo to test the pagination. If you are studying the Get_children () function, hopefully this article will bring you good luck.

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