The method of using WordPress to get the author and classified information of the article _php example

Author
Query and some author (user) related articles, you can use 4 parameters:

1. Author (integer): User ID
2. Author_name (String): User's nickname ("User_nicename" field)
3. Author__in (array): User ID
4. Author__not_in (array): User ID

Get an article from an author

Get by User ID:

$query = new Wp_query (' author=123 ');

Based on the user's nickname (the "User_nicename" field) gets:

$query = new Wp_query (' Author_name=rami ');

Get articles from multiple authors

Get articles from multiple authors based on user ID:

$query = new Wp_query (' author=2,6,17,38 ');

Exclude author's articles

Exclude an author can use the user ID to precede the "-" way:

$query = new Wp_query (' author=-12 ');

Multi-author Query

Get articles from multiple authors:

$query = new Wp_query (Array (' author__in ' = = = Array (2, 6)));

Exclude articles from multiple authors:

$query = new Wp_query (Array (' author__not_in ' = = = Array (2, 6)));

Classification

There are 5 parameters available for classification:

1. Cat (integer): Category ID
2. Category_name (String): Category Alias
3. Category__and (Array): Category ID
4. Category__in (Array): Category ID
5. Category__not_in (Array): Category ID

Get a categorized article

Get a categorized article (containing subcategories of this classification) based on the ID of the category:

$query = new Wp_query (' cat=4 ');

Get a categorized article (containing subcategories of this classification) based on the alias of the classification:

$query = new Wp_query (' Category_name=staff ');

Get a categorized article based on the ID of the category (it does not contain subcategories for this classification):

$query = new Wp_query (' category__in=4 ');

Get Articles with multiple classifications

Get more than one categorized article based on the ID of the category:

$query = new Wp_query (' cat=2,6,17,38 ');

Get multiple categories of articles based on classification aliases:

$query = new Wp_query (' category_name=staff,news ');

Get articles that have several categories at the same time based on classification aliases:

$query = new Wp_query (' category_name=staff+news ');

Exclude Categories

To exclude some categories, just precede the category ID with the "-" number:

$query = new Wp_query (' cat=-12,-34,-56 ');

Multi-category Query

To get an article with multiple classifications at once, the following code gets an article that must have a category with IDs 2 and 6 at the same time:

$query = new Wp_query (Array (' category__and ' = = = Array (2, 6)));

Get Articles with multiple classifications, without their subcategories, and the following code gets an article with an ID of 2 or a category with ID 6:

$query = new Wp_query (Array (' category__in ' = = = Array (2, 6)));

To exclude some classified articles:

$query = new Wp_query (Array (' category__not_in ' = = = Array (2, 6)));

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