CI_Form_validation::error_string PHP Method

    public function error_string($prefix = '', $suffix = '')
    {
        // No errors, validation passes!
        if (count($this->_error_array) === 0) {
            return '';
        }
        if ($prefix === '') {
            $prefix = $this->_error_prefix;
        }
        if ($suffix === '') {
            $suffix = $this->_error_suffix;
        }
        // Generate the error string
        $str = '';
        foreach ($this->_error_array as $val) {
            if ($val !== '') {
                $str .= $prefix . $val . $suffix . "\n";
            }
        }
        return $str;
    }