Filter hook 'query_vars'

Hook Information

Hook Parameters

Usage Examples

<?php
// Hook into query_vars
add_filter('query_vars', 'my_custom_filter', 10, 1);

function my_custom_filter($public_query_vars) {
    // Your custom filtering logic here
    return $public_query_vars;
}

Source Code Context

<?php
 306  		 *
 307  		 * @since 1.5.0
 308  		 *
 309  		 * @param string[] $public_query_vars The array of allowed query variable names.
 310  		 */
 311  		$this->public_query_vars = apply_filters( 'query_vars', $this->public_query_vars );
 312  
 313  		foreach ( get_post_types( array(), 'objects' ) as $post_type => $t ) {
 314  			if ( is_post_type_viewable( $t ) && $t->query_var ) {
 315  				$post_type_query_vars[ $t->query_var ] = $post_type;
 316  			}

PHP Documentation

<?php
/**
		 * Filters the query variables allowed before processing.
		 *
		 * Allows (publicly allowed) query vars to be added, removed, or changed prior
		 * to executing the query. Needed to allow custom rewrite rules using your own arguments
		 * to work, or any other custom query variables you want to be publicly available.
		 *
		 * @since 1.5.0
		 *
		 * @param string[] $public_query_vars The array of allowed query variable names.
		 */