function.html_options.php

转载中国源码下载站 1) 基于PHP语言开发,MYSQL数据库驱动的多用户留言本 2) 采用PHP官方提供的编译模板引擎smarty 3) 代码、页面分离

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


/**
 * Smarty {html_options} function plugin
 *
 * Type:     function<br>
 * Name:     html_options<br>
 * Input:<br>
 *           - 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
 * Purpose:  Prints the list of <option> tags generated from
 *           the passed parameters
 * @link http://smarty.php.net/manual/en/language.function.html.options.php {html_image}
 *      (Smarty online manual)
 * @param array
 * @param Smarty
 * @return string
 * @uses smarty_function_escape_special_chars()
 */
function smarty_function_html_options($params, &$smarty)
{
   require_once $smarty->_get_plugin_filepath('shared','escape_special_chars');
  
   $name = null;
   $values = null;
   $options = null;
   $selected = array();
   $output = null;

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

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

		case 'selected':
		case 'values':
		case 'output':
			$$_key = array_values((array)$_val);      
			break;

		default:
			if(!is_array($_val)) {
				$extra .= ' '.$_key.'="'.smarty_function_escape_special_chars($_val).'"';
			} else {
				$smarty->trigger_error("html_options: extra attribute '$_key' cannot be an array", E_USER_NOTICE);
			}
			break;					
		}
	}

   if (!isset($options) && !isset($values))
      return ''; /* raise error here? */

   $_html_result = '';

   if (is_array($options)) {

      foreach ($options as $_key=>$_val)
	 $_html_result .= smarty_function_html_options_optoutput($_key, $_val, $selected);      
    
   } else {  

      foreach ((array)$values as $_i=>$_key) {
	 $_val = isset($output[$_i]) ? $output[$_i] : '';
	 $_html_result .= smarty_function_html_options_optoutput($_key, $_val, $selected);      
      }

   }

   if(!empty($name)) {
      $_html_result = '<select name="' . $name . '"' . $extra . '>' . "\n" . $_html_result . '</select>' . "\n";
   }

   return $_html_result;

}

function smarty_function_html_options_optoutput($key, $value, $selected) {
   if(!is_array($value)) {
      $_html_result = '<option label="' . smarty_function_escape_special_chars($value) . '" value="' . 
	 smarty_function_escape_special_chars($key) . '"';
      if (in_array($key, $selected))
	 $_html_result .= ' selected="selected"';
      $_html_result .= '>' . smarty_function_escape_special_chars($value) . '</option>' . "\n";
   } else {
      $_html_result = smarty_function_html_options_optgroup($key, $value, $selected);
   }
   return $_html_result;	
}

function smarty_function_html_options_optgroup($key, $values, $selected) {
   $optgroup_html = '<optgroup label="' . smarty_function_escape_special_chars($key) . '">' . "\n";
   foreach ($values as $key => $value) {
      $optgroup_html .= smarty_function_html_options_optoutput($key, $value, $selected);
   }
   $optgroup_html .= "</optgroup>\n";
   return $optgroup_html;
}

/* vim: set expandtab: */

?>