meta_query is a parameter in WordPress that is used to filter posts or custom post types based on the values of their custom fields. It is a sub-parameter of the
WP_Query class and is used to specify one or more conditions that must be met by the custom fields of the posts to be retrieved.
meta_query parameter accepts an array of arrays, each of which represents a single condition. Each condition array can contain the following keys:
key: the name of the custom field to be queried
value: the value of the custom field to be matched
compare: the comparison operator to be used (e.g.
type: the data type of the custom field (e.g.
Here’s an example of how to use the
meta_query parameter to retrieve posts that have a custom field called “price” with a value greater than or equal to 100:
$args = array( 'post_type' => 'product', 'meta_query' => array( array( 'key' => 'price', 'value' => 100, 'compare' => '>=', 'type' => 'NUMERIC' ) ) ); $query = new WP_Query( $args );
Note that the
meta_query parameter can be used in combination with other parameters, such as post_type, category, tag, etc., to refine the query results further.