WordPress at a glance
function is not described

WP_Date_Query::get_compare() public WP 3.7.0

Determines and validates what comparison operator to use.

{} It's a method of the class: WP_Date_Query{}

No Hooks.

Return

String. The comparison operator.

Usage

$WP_Date_Query = new WP_Date_Query();
$WP_Date_Query->get_compare( $query );
$query(array) (required)
A date query or a date subquery.

Changelog

Since 3.7.0 Introduced.

Code of WP_Date_Query::get_compare() WP 5.5.1

<?php
public function get_compare( $query ) {
	if ( ! empty( $query['compare'] )
		&& in_array( $query['compare'], array( '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ), true )
	) {
		return strtoupper( $query['compare'] );
	}

	return $this->compare;
}