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

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

/**
 * Smarty {counter} function plugin
 *
 * Type:     function<br>
 * Name:     counter<br>
 * Purpose:  print out a counter value
 *
 * @author Monte Ohrt <monte at ohrt dot com>
 * @link http://www.smarty.net/manual/en/language.function.counter.php {counter}
 *       (Smarty online manual)
 * @param array                    $params   parameters
 * @param Smarty_Internal_Template $template template object
 * @return string|null
 */
function smarty_function_counter($params, $template)
{
    static $counters = array();

    $name = (isset($params['name'])) ? $params['name'] : 'default';
    if (!isset($counters[$name])) {
        $counters[$name] = array(
            'start'=>1,
            'skip'=>1,
            'direction'=>'up',
            'count'=>1
            );
    }
    $counter =& $counters[$name];

    if (isset($params['start'])) {
        $counter['start'] = $counter['count'] = (int)$params['start'];
    }

    if (!empty($params['assign'])) {
        $counter['assign'] = $params['assign'];
    }

    if (isset($counter['assign'])) {
        $template->assign($counter['assign'], $counter['count']);
    }
    
    if (isset($params['print'])) {
        $print = (bool)$params['print'];
    } else {
        $print = empty($counter['assign']);
    }

    if ($print) {
        $retval = $counter['count'];
    } else {
        $retval = null;
    }