PMA\libraries\Util::getDropdown PHP Method

    public static function getDropdown($select_name, $choices, $active_choice, $id, $class = '', $placeholder = null)
    {
        $result = '<select' . ' name="' . htmlspecialchars($select_name) . '"' . ' id="' . htmlspecialchars($id) . '"' . (!empty($class) ? ' class="' . htmlspecialchars($class) . '"' : '') . '>';
        $resultOptions = '';
        $selected = false;
        foreach ($choices as $one_choice_value => $one_choice_label) {
            $resultOptions .= '<option value="' . htmlspecialchars($one_choice_value) . '"';
            if ($one_choice_value == $active_choice) {
                $resultOptions .= ' selected="selected"';
                $selected = true;
            }
            $resultOptions .= '>' . htmlspecialchars($one_choice_label) . '</option>';
        }
        if (!empty($placeholder)) {
            $resultOptions = '<option value="" disabled="disabled"' . (!$selected ? ' selected="selected"' : '') . '>' . $placeholder . '</option>' . $resultOptions;
        }
        $result .= $resultOptions . '</select>';
        return $result;
    }

/**
 * Get HTML fieldset for Table option, it contains HTML table for options
 *
 * @param string  $comment            Comment
 * @param array   $tbl_collation      table collation
 * @param string  $tbl_storage_engine table storage engine
 * @param boolean $is_myisam_or_aria  whether MYISAM | ARIA or not
 * @param boolean $is_isam            whether ISAM or not
 * @param string  $pack_keys          pack keys
 * @param string  $delay_key_write    delay key write
 * @param string  $auto_increment     value of auto increment
 * @param string  $transactional      value of transactional
 * @param string  $page_checksum      value of page checksum
 * @param boolean $is_innodb          whether INNODB or not
 * @param boolean $is_pbxt            whether PBXT or not
 * @param boolean $is_aria            whether ARIA or not
 * @param string  $checksum           the checksum
 *
 * @return string $html_output
 */
function PMA_getTableOptionFieldset($comment, $tbl_collation, $tbl_storage_engine, $is_myisam_or_aria, $is_isam, $pack_keys, $delay_key_write, $auto_increment, $transactional, $page_checksum, $is_innodb, $is_pbxt, $is_aria, $checksum)
{
    $html_output = '<fieldset>' . '<legend>' . __('Table options') . '</legend>';
    $html_output .= '<table>';
    $html_output .= PMA_getHtmlForRenameTable();
    $html_output .= PMA_getHtmlForTableComments($comment);
    //Storage engine
    $html_output .= '<tr><td class="vmiddle">' . __('Storage Engine') . '&nbsp;' . PMA\libraries\Util::showMySQLDocu('Storage_engines') . '</td>' . '<td>' . StorageEngine::getHtmlSelect('new_tbl_storage_engine', null, $tbl_storage_engine) . '</td>' . '</tr>';
    //Table character set
    $html_output .= '<tr><td class="vmiddle">' . __('Collation') . '</td>' . '<td>' . PMA_generateCharsetDropdownBox(PMA_CSDROPDOWN_COLLATION, 'tbl_collation', null, $tbl_collation, false) . '</td>' . '</tr>';
    // Change all Column collations
    $html_output .= '<tr><td></td><td>' . '<input type="checkbox" name="change_all_collations" value="1" ' . 'id="checkbox_change_all_collations" />' . '<label for="checkbox_change_all_collations">' . __('Change all column collations') . '</label>' . '</td></tr>';
    if ($is_myisam_or_aria || $is_isam) {
        $html_output .= PMA_getHtmlForPackKeys($pack_keys);
    }
    // end if (MYISAM|ISAM)
    if ($is_myisam_or_aria) {
        $html_output .= PMA_getHtmlForTableRow('new_checksum', 'CHECKSUM', $checksum);
        $html_output .= PMA_getHtmlForTableRow('new_delay_key_write', 'DELAY_KEY_WRITE', $delay_key_write);
    }
    // end if (MYISAM)
    if ($is_aria) {
        $html_output .= PMA_getHtmlForTableRow('new_transactional', 'TRANSACTIONAL', $transactional);
        $html_output .= PMA_getHtmlForTableRow('new_page_checksum', 'PAGE_CHECKSUM', $page_checksum);
    }
    // end if (ARIA)
    if (mb_strlen($auto_increment) > 0 && ($is_myisam_or_aria || $is_innodb || $is_pbxt)) {
        $html_output .= '<tr><td class="vmiddle">' . '<label for="auto_increment_opt">AUTO_INCREMENT</label></td>' . '<td><input type="number" name="new_auto_increment" ' . 'id="auto_increment_opt"' . 'value="' . $auto_increment . '" /></td>' . '</tr> ';
    }
    // end if (MYISAM|INNODB)
    $possible_row_formats = PMA_getPossibleRowFormat();
    // for MYISAM there is also COMPRESSED but it can be set only by the
    // myisampack utility, so don't offer here the choice because if we
    // try it inside an ALTER TABLE, MySQL (at least in 5.1.23-maria)
    // does not return a warning
    // (if the table was compressed, it can be seen on the Structure page)
    if (isset($possible_row_formats[$tbl_storage_engine])) {
        $current_row_format = mb_strtoupper($GLOBALS['showtable']['Row_format']);
        $html_output .= '<tr><td class="vmiddle">' . '<label for="new_row_format">ROW_FORMAT</label></td>' . '<td>';
        $html_output .= PMA\libraries\Util::getDropdown('new_row_format', $possible_row_formats[$tbl_storage_engine], $current_row_format, 'new_row_format');
        $html_output .= '</td></tr>';
    }
    $html_output .= '</table>' . '</fieldset>';
    return $html_output;
}