Adapter/ApcuAdapter.php
protected function doClearItem(array $item, $prefix)
    {
        $id = $item['info'];
        $key = substr($id, strrpos($id, ':') + 1);
        $res = true;

        if ('' === $prefix || 0 === strpos($id, $prefix)) {
            $res = $this->deleteItem($key);
        }

        return $res;
    }
protected function doClearItem(array $item, $prefix)
    {
        $id = $item['info'];
        $key = substr($id, strrpos($id, ':') + 1);
        $res = true;

        if ('' === $prefix || 0 === strpos($id, $prefix)) {
            $res = $this->deleteItem($key);
        }

        return $res;
    }
protected function doClearItem ( array $ item , $ prefix ) { $ id = $ item [ 'info' ] ; $ key = substr ( $ id , strrpos ( $ id , ':' ) + 1 ) ; $ res = true ; if ( '' === $ prefix || 0 === strpos ( $ id , $ prefix ) ) { $ res = $ this -> deleteItem ( $ key ) ; } return $ res ; }
Delete the key that starting by the prefix.

@param array  $item   The cache item
@param string $prefix The full prefix

@return bool
Delete the key that starting by the prefix .