public function deleteIndex($keys)
    {
        if (is_string($keys)) {
            $indexName = $keys;
            if (! preg_match('#_-?1$#', $indexName)) {
                $indexName .= '_1';
            }
        } elseif (is_array($keys)) {
            $indexName = \MongoDB\generate_index_name($keys);
        } else {
            throw new \InvalidArgumentException();
        }

        try {
            return TypeConverter::toLegacy($this->collection->dropIndex($indexName));
        } catch (\MongoDB\Driver\Exception\Exception $e) {
            return ExceptionConverter::toResultArray($e) + ['nIndexesWas' => count($this->getIndexInfo())];
        }
    }
public function deleteIndex($keys)
    {
        if (is_string($keys)) {
            $indexName = $keys;
            if (! preg_match('#_-?1$#', $indexName)) {
                $indexName .= '_1';
            }
        } elseif (is_array($keys)) {
            $indexName = \MongoDB\generate_index_name($keys);
        } else {
            throw new \InvalidArgumentException();
        }

        try {
            return TypeConverter::toLegacy($this->collection->dropIndex($indexName));
        } catch (\MongoDB\Driver\Exception\Exception $e) {
            return ExceptionConverter::toResultArray($e) + ['nIndexesWas' => count($this->getIndexInfo())];
        }
    }
public function deleteIndex ( $ keys ) { if ( is_string ( $ keys ) ) { $ indexName = $ keys ; if ( ! preg_match ( '#_-?1$#' , $ indexName ) ) { $ indexName .= '_1' ; } } elseif ( is_array ( $ keys ) ) { $ indexName = \ MongoDB \ generate_index_name ( $ keys ) ; } else { throw new \ InvalidArgumentException ( ) ; } try { return TypeConverter :: toLegacy ( $ this -> collection -> dropIndex ( $ indexName ) ) ; } catch ( \ MongoDB \ Driver \ Exception \ Exception $ e ) { return ExceptionConverter :: toResultArray ( $ e ) + [ 'nIndexesWas' => count ( $ this -> getIndexInfo ( ) ) ] ; } }
Deletes an index from this collection

@link http://www.php.net/manual/en/mongocollection.deleteindex.php
@param string|array $keys Field or fields from which to delete the index.
@return array Returns the database response.
Deletes an index from this collection