How to use posts_fields filter in WordPress

posts_fields filter

Filters the SELECT clause of the query.

apply_filters_ref_array( 'posts_fields', string $fields, WP_Query $query )

Description

This is a filter hook, and it modifies the SELECT clause of the query. It consists of two parameters: $fields and $query. The posts_fields filter controls which database fields will be returned in the query, and it usually defaults to all fields from the posts table.

Parameters

• $fields : (string) The SELECT clause of the query.
• $query : (WP_Query) The WP_Query instance (passed by reference).

Live Example

To run the hook, copy the example below.

Example 1: Basic Usage of posts_fields Filter

This example shows how to apply the posts_fields filter in a basic scenario.

$array = apply_filters( 'posts_fields', $array ); 
                         
if ( !empty( $array ) ) { 
   // everything has led up to this point... 
} 

Example 2: Adding a Hook Callback

The following example demonstrates how to add a callback function to the posts_fields filter.

// define the posts_fields callback 
function weplugins_filter_posts_fields( $array ) { 
    // make filter magic happen here... 
    return $array; 
}; 
         
// add the filter 
add_filter( 'posts_fields', 'weplugins_filter_posts_fields', 10, 1 ); 

Example 3: Removing a Hook Callback

To remove a callback function from the posts_fields filter, use the example below.

// remove the filter 
remove_filter( 'posts_fields', 'weplugins_filter_posts_fields', 10, 1 ); 

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