Nette\Database\Connection::quote PHP Метод

    public function quote($string, $type = PDO::PARAM_STR)
    {
        try {
            return $this->getPdo()->quote($string, $type);
        } catch (PDOException $e) {
            throw DriverException::from($e);
        }
    }

 private function formatValue($value)
 {
     if (is_string($value)) {
         if (strlen($value) > 20) {
             $this->remaining[] = $value;
             return '?';
         } else {
             return $this->connection->quote($value);
         }
     } elseif (is_int($value)) {
         return (string) $value;
     } elseif (is_float($value)) {
         return rtrim(rtrim(number_format($value, 10, '.', ''), '0'), '.');
     } elseif (is_bool($value)) {
         return $this->driver->formatBool($value);
     } elseif ($value === NULL) {
         return 'NULL';
     } elseif ($value instanceof Table\ActiveRow) {
         return $value->getPrimary();
     } elseif (is_array($value) || $value instanceof \Traversable) {
         $vx = $kx = array();
         if ($value instanceof \Traversable) {
             $value = iterator_to_array($value);
         }
         if (isset($value[0])) {
             // non-associative; value, value, value
             foreach ($value as $v) {
                 $vx[] = $this->formatValue($v);
             }
             return implode(', ', $vx);
         } elseif ($this->arrayMode === 'values') {
             // (key, key, ...) VALUES (value, value, ...)
             $this->arrayMode = 'multi';
             foreach ($value as $k => $v) {
                 $kx[] = $this->driver->delimite($k);
                 $vx[] = $this->formatValue($v);
             }
             return '(' . implode(', ', $kx) . ') VALUES (' . implode(', ', $vx) . ')';
         } elseif ($this->arrayMode === 'assoc') {
             // key=value, key=value, ...
             foreach ($value as $k => $v) {
                 $vx[] = $this->driver->delimite($k) . '=' . $this->formatValue($v);
             }
             return implode(', ', $vx);
         } elseif ($this->arrayMode === 'multi') {
             // multiple insert (value, value, ...), ...
             foreach ($value as $v) {
                 $vx[] = $this->formatValue($v);
             }
             return '(' . implode(', ', $vx) . ')';
         }
     } elseif ($value instanceof \DateTime) {
         return $this->driver->formatDateTime($value);
     } elseif ($value instanceof SqlLiteral) {
         return $value->__toString();
     } else {
         $this->remaining[] = $value;
         return '?';
     }
 }