ThinkPHP/Library/Vendor/Smarty/plugins/function.html_options.php

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<?php
/**
 * Smarty plugin
 * 
 * @package Smarty
 * @subpackage PluginsFunction
 */

/**
 * Smarty {html_options} function plugin
 * 
 * Type:     function<br>
 * Name:     html_options<br>
 * Purpose:  Prints the list of <option> tags generated from
 *           the passed parameters<br>
 * Params:
 * <pre>
 * - name       (optional) - string default "select"
 * - values     (required) - if no options supplied) - array
 * - options    (required) - if no values supplied) - associative array
 * - selected   (optional) - string default not set
 * - output     (required) - if not options supplied) - array
 * - id         (optional) - string default not set
 * - class      (optional) - string default not set
 * </pre>
 * 
 * @link http://www.smarty.net/manual/en/language.function.html.options.php {html_image}
 *      (Smarty online manual)
 * @author Monte Ohrt <monte at ohrt dot com> 
 * @author Ralf Strehle (minor optimization) <ralf dot strehle at yahoo dot de>
 * @param array                    $params   parameters
 * @param Smarty_Internal_Template $template template object
 * @return string 
 * @uses smarty_function_escape_special_chars()
 */
function smarty_function_html_options($params, $template)
{
    require_once(SMARTY_PLUGINS_DIR . 'shared.escape_special_chars.php');

    $name = null;
    $values = null;
    $options = null;
    $selected = null;
    $output = null;
    $id = null;
    $class = null;

    $extra = '';

    foreach ($params as $_key => $_val) {
        switch ($_key) {
            case 'name':
            case 'class':
            case 'id':
                $$_key = (string) $_val;
                break;

            case 'options':
                $options = (array) $_val;
                break;