* @license GNU General Public License version 2 or later; see LICENSE.txt */ defined('_JEXEC') or die; /** * Database Prefix field. * * @since 1.6 */ class InstallationFormFieldPrefix extends JFormField { /** * The form field type. * * @var string * @since 1.6 */ protected $type = 'Prefix'; /** * Method to get the field input markup. * * @return string The field input markup. * * @since 1.6 */ protected function getInput() { // Initialize some field attributes. $size = $this->element['size'] ? abs((int) $this->element['size']) : 5; $maxLength = $this->element['maxlength'] ? ' maxlength="' . (int) $this->element['maxlength'] . '"' : ''; $class = $this->element['class'] ? ' class="' . (string) $this->element['class'] . '"' : ''; $readonly = (string) $this->element['readonly'] === 'true' ? ' readonly="readonly"' : ''; $disabled = (string) $this->element['disabled'] === 'true' ? ' disabled="disabled"' : ''; // Make sure somebody doesn't put in a too large prefix size value. if ($size > 10) { $size = 10; } // If a prefix is already set, use it instead. $session = JFactory::getSession()->get('setup.options', array()); if (empty($session['db_prefix'])) { // Create the random prefix. $prefix = ''; $chars = range('a', 'z'); $numbers = range(0, 9); // We want the fist character to be a random letter. shuffle($chars); $prefix .= $chars[0]; // Next we combine the numbers and characters to get the other characters. $symbols = array_merge($numbers, $chars); shuffle($symbols); for ($i = 0, $j = $size - 1; $i < $j; ++$i) { $prefix .= $symbols[$i]; } // Add in the underscore. $prefix .= '_'; } else { $prefix = $session['db_prefix']; } // Initialize JavaScript field attributes. $onchange = $this->element['onchange'] ? ' onchange="' . (string) $this->element['onchange'] . '"' : ''; return ''; } }