Check MongoDB Collection Existance

check_mongodb_collection_exists.php

<?php

/**
 * Checks if a Collection already exists.
 * Returns true if Collection exists, otherwise it returns false.
 *
 * @param $collection
 *
 * @return bool
 */

public function CollectionExists($collection) {
	if ($this->db_handle->system->namespaces->findOne(["name" => $this->db.".".$collection]) === null) {
		return false;
	} else {
		return true;
	}
}