本文实例讲述了ThinkPHP进程计数类Process用法。分享给大家供大家参考。具体如下：

项目中有一个需求：由于某一后台任务比较占带宽，所以要限制进程数。花了点时间，写了类，目前版本功能比较简单。

Process.class.php文件如下：

<?php/** * Process * * @package * @version $id$ * @copyright 2005-2011 SUCOP.COM * @author Dijia Huang <huangdijia@gmail.com> * @license PHP Version 3.0 {@link http://www.php.net/license/3_0.txt} */class Process{ const PROCESS_KEY = '~Process'; const PROCESS_MAXNUM = 10; /** * start * * @static * @access public * @return void */ static public function start(){ $list = self::__getList(); $name = self::__getName(); if(!isset($list[$name])){ $list[$name] = array('count'=>1, 'lasttime'=>time()); }else{ if((time()-$list[$name]['time']) > 600){ $list[$name]['count'] = 1; }else{ $list[$name]['count'] += 1; } } self::__setList($list); } /** * destory * * @static * @access public * @return void */ static public function destory(){ $list = self::__getList(); $name = self::__getName(); if(isset($list[$name])){ if($list[$name]['count'] <= 1){ unset($list[$name]); }else{ $list[$name]['count'] -= 1; $list[$name]['lasttime'] = time(); } self::__setList($list); } } /** * getCount * * @static * @access public * @return void */ static public function getCount(){ $list = self::__getList(); $name = self::__getName(); return $list[$name]['count']; } /** * getMaxnum * * @static * @access public * @return void */ static public function getMaxnum(){ $name = self::__getName(); return C($name) ? C($name) : self::PROCESS_MAXNUM; } /** * getName * * @static * @access public * @return void */ static public function getName(){ return self::__getName(); } /** * isOvertop * * @static * @access public * @return void */ static public function isOvertop(){ return (self::getCount() > self::getMaxnum()); } /** * getLasttime * * @static * @access public * @return void */ static public function getLasttime(){ $list = self::__getList(); $name = self::__getName(); return $list[$name]['lasttime']; } /** * clear * * @static * @access public * @return void */ static public function clear(){ F(self::PROCESS_KEY, null); } /** * __setList * * @param mixed $list * @static * @access private * @return void */ static private function __setList($list=null){ if(!is_array($list) || empty($list)) F(self::PROCESS_KEY, null); else F(self::PROCESS_KEY, $list); } /** * __getList * * @static * @access private * @return void */ static private function __getList(){ $list = F(self::PROCESS_KEY); if(!is_array($list)) return array(); else return $list; } /** * __getName * * @static * @access private * @return void */ static private function __getName(){ return (defined('GROUP_NAME') ? GROUP_NAME.'_' : '') . MODULE_NAME . '_' . ACTION_NAME; }}?>

调用方法：

<?phpclass IndexAction extends Action { // 初始化模块 public function _initialize(){ parent::_initialize(); import('@.Util.Process'); Process::start(); } function __destruct(){ Process :: destory(); } public function index(){ C('Index_index', 3); // 动态更改限制数, 默认为10 if(Process::isOvertop()) echo "超出限制"; else "未超出限制"; }}?>

希望本文所述对大家基于ThinkPHP框架的php程序设计有所帮助。