WP Query with meta queries

1. How do I add a meta query in WordPress?
2. What is Meta_value?
3. How do I get meta value in WordPress?
4. What is $WP_Query?
5. What is meta key WordPress?
6. How do I display custom field values in WordPress?
7. How do I get all post meta?
8. How do I find meta data?
9. How do I find Meta key?
10. What does WP_Query return?
11. What is Wp_reset_postdata ()?
12. What is offset in WP_Query?

How do I add a meta query in WordPress?

WP_Meta_Query is a class defined in wp-includes/meta. php that generates the necessary SQL for meta-related queries. It was introduced in Version 3.2. 0 and greatly improved the possibility to query posts by custom fields.

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”.

How do I get meta value in WordPress?

From the Codex: Retrieve post meta field for a post. Will be an array if $single is false.
...
The function accepts three parameters:

1. the ID of the post.
2. the metadata key.
3. an optional boolean value for if you want to retrieve the value as a string or as an array (where an array is the default value if nothing is specified)

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 is meta key WordPress?

The meta key determines how the field will be stored into the database of your website. ... The metakey is used to retrieve the saved value from the database and display it. If you are a developer, chances are you already know about this WordPress function. https://codex.wordpress.org/Function_Reference/get_user_meta.

How do I display custom field values in WordPress?

The default way to show custom fields in WordPress would be to:

1. Open the single. php file or page. ...
2. Find the_content function so you can list your custom field data after the actual content of the post or page.
3. Use the get_post_meta function to fetch custom field values using their meta key then list them using PHP echo.

How do I get all post meta?

If you wanted to see all the post meta keys and values for a post,page or custom post type in WordPress you can either see them in the database in the wp_postmeta table or you could use the get_post_meta function to retrieve all the post meta or a specific key.

How do I find meta data?

Windows

1. Navigate to the image file you wish to view the metadata of.
2. Right-click the file and select “Properties.”
3. A popup window will display basic metadata.
4. To view more metadata, click the “details” tab and use the side scroll up and down for more results.
5. Open the file using “Preview.”

How do I find Meta key?

The meta key is the field name. Further, you can use the below function to retrieve the data from the database. get_post_meta($order_id, 'field_name', true);

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.

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.