WP_Query::fill_query_vars( array $query_vars ): array

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Fills in the query variables, which do not exist within the parameter.

Parameters

$query_varsarrayrequired
Defined query variables.

Return

array Complete query variables with undefined ones filled in empty.

Source

public function fill_query_vars( $query_vars ) {	$keys = array(	'error',	'm',	'p',	'post_parent',	'subpost',	'subpost_id',	'attachment',	'attachment_id',	'name',	'pagename',	'page_id',	'second',	'minute',	'hour',	'day',	'monthnum',	'year',	'w',	'category_name',	'tag',	'cat',	'tag_id',	'author',	'author_name',	'feed',	'tb',	'paged',	'meta_key',	'meta_value',	'preview',	's',	'sentence',	'title',	'fields',	'menu_order',	'embed',	);	foreach ( $keys as $key ) {	if ( ! isset( $query_vars[ $key ] ) ) {	$query_vars[ $key ] = '';	}	}	$array_keys = array(	'category__in',	'category__not_in',	'category__and',	'post__in',	'post__not_in',	'post_name__in',	'tag__in',	'tag__not_in',	'tag__and',	'tag_slug__in',	'tag_slug__and',	'post_parent__in',	'post_parent__not_in',	'author__in',	'author__not_in',	'search_columns',	);	foreach ( $array_keys as $key ) {	if ( ! isset( $query_vars[ $key ] ) ) {	$query_vars[ $key ] = array();	}	}	return $query_vars; } 

Changelog

VersionDescription
4.5.0Removed the comments_popup public query variable.
2.1.0Introduced.

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