Query about wp_query

1. What is $WP_Query?
2. What does WP_Query return?
3. How do I query a post in WordPress?
4. What is taxonomy query and meta query?
5. What is Wp_reset_postdata ()?
6. What is offset in WP_Query?
7. What is Meta_value?
8. What is Posts_per_page?
9. How do I query categories in WordPress?
10. What is the difference between an action and a filter?
11. What is current query?
12. How do I create a custom post type query?

What is $WP_Query?

WP_Query is a class defined in WordPress. It allows developers to write custom queries and display posts using different parameters. It is possible for developers to directly query WordPress database. However, WP_Query is one of the recommended ways to query posts from WordPress database.

What does WP_Query return?

The WP_Query object is used to query posts and will return an object containing an array of $post objects and many useful methods. The get_posts function makes use of the above WP_Query object, however, it only returns an array of $post objects making it a simpler way to find and loop over posts.

How do I query a post in WordPress?

Place a call to query_posts() in one of your Template files before The Loop begins. The WP_Query object will generate a new SQL query using your parameters. When you do this, WordPress ignores the other parameters it receives via the URL (such as page number or category).

What is taxonomy query and meta query?

lewismcarey/WORDPRESS WP Query Taxonomy and Meta Query

This shows the two alternate methods to running taxonomy and post meta paramaters within WP Query. * Shorthand version only accepts one postmeta key. * Longhand version is the full method and has much more flexiblity for complex queries.

What is Wp_reset_postdata ()?

wp_reset_postdata() restores the global $post variable to the current post in the main query (contained in the global $wp_query variable as opposed to the $sec_query variable), so that the template tags refer to the main query loop by default again.

What is offset in WP_Query?

Offsets are useful because they can allow a developer to skip a certain number of WordPress posts before starting output. ... If a developer sets a manual offset value, pagination will not function because that value will override WordPress's automatic adjustment of the offset for a given page.

What is Meta_value?

meta_value. The meta_value argument queries post that have the value you define. The meta_value argument is used for string values. This example will query any posts with a custom meta field that has the value “data1”.

What is Posts_per_page?

1. The right answer for your issue is 'posts_per_page' => -1 because -1 will return unlimited posts per page As the others users answer.

How do I query categories in WordPress?

In general avoid using query_posts because it is altering the globals inside the main loop. You can use get_posts() : <? php $args = array( 'posts_per_page' => 5, 'offset'=> 1, 'category' => 1 ); $myposts = get_posts( $args ); foreach ( $myposts as $post ) : setup_postdata( $post ); ?>

What is the difference between an action and a filter?

Actions can have any functionality, and Filters can exist to modify data. Actions may or may not passed any data by their action hook, and Filters are passed data to modify by their hook. Actions do not return their changes, and Filters must return their changes.

What is current query?

The CURRENT QUERY ACCELERATION special register specifies a value that identifies when Db2 sends dynamic SQL queries to an accelerator server and what Db2 does if the accelerator server fails. The special register does not apply to static SQL queries. The data type is VARCHAR(255).

How do I create a custom post type query?

You can query posts of a specific type by passing the post_type key in the arguments array of the WP_Query class constructor. $loop ->the_post();