A method for obtaining the author and classification information of the article in WordPress to collate _php instances

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 ("User_nicename" field), get:

$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 article

Exclude an author from using the "-" method in front of the user ID:

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

Multiple author queries

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 an article in a category

Gets a categorized article (a subcategory that contains this category) based on the ID of the category:

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

Gets a categorized article (a subcategory that contains this category) based on the alias of the category:

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

Gets a categorized article based on the ID of the category (a subcategory that does not contain this category):

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

Get Articles for multiple categories

Get multiple categories of articles based on the ID of the category:

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

To get multiple categories of articles based on a category alias:

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

Get articles that have several categories at the same time based on the category alias:

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

Exclude classification

To exclude some categories, you only need to precede the category ID with the "-" sign:

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

Multi-Classification Query

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

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

Gets multiple categories of articles that do not contain subcategories, and the following code gets an article with a category with ID 2 or ID 6:

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

Exclude some categories of articles:

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