yii框架通过控制台命令创建定时任务

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假设Yii项目路径为 /home/apps

1. 创建文件 /home/apps/web/protected/commands/console.php

$yii = '/home/apps/framework/yii.php';
require_once($yii);
$configFile = dirname(__FILE__).'/../config/console.php';
Yii::createConsoleApplication($configFile)->run();

2. 修改配置文件 /home/apps/web/protected/config/console.php，配置需要的组件、数据库连接，日志等信息，格式类似主配置文件main.php

// This is the configuration for yiic console application.
// Any writable CConsoleApplication properties can be configured here.
return array(
'basePath'=>dirname(__FILE__).DIRECTORY_SEPARATOR.'..',
'name'=>'My Console Application',
'import'=>array(
'application.models.*',
'application.components.*',
'application.extensions.*',
),
// preloading 'log' component
'preload'=>array('log'), // application components
'components'=>array( // database settings are configured in database.php
//'db'=>require(dirname(__FILE__).'/database.php'),
'db'=>array(
//'connectionString' => 'sqlite:'.dirname(__FILE__).'/../data/testdrive.db',
// uncomment the following lines to use a MySQL database
'connectionString' => 'mysql:host=localhost;dbname=testdrive',
'emulatePrepare' => true,
'username' => 'root',
'password' => '',
'charset' => 'utf8',
),
'log'=>array(
'class'=>'CLogRouter',
'routes'=>array(
array(
'class'=>'CFileLogRoute',
'levels'=>'error, warning',
),
),
), ),
);

3. 在 /home/apps/web/protected/commands/ 下新建 TestCommand 类，继承 CConsoleCommand，在TestCommand中，可以使用项目的配置信息和Yii的各种方法

class TestCommand extends CConsoleCommand { public function getHelp() {
return 'test command help';
} public function run($args) {
echo 'hello '. $arg[0];
}}

执行命令

php console.php Test

在这个类中我们需要完成2个方法，一个是getHelp()，他用于提供Test这个类命令的帮助信息，我们可以在shell中通过命令来查看这个类的帮助

php console.php help Test

此外这个类的主要功能是通过继承 run($args) 这个方法来实现的，其中$args 为从命令行获得参数数组。
现在如果我们在屏幕上输入：php console.php Test li
我们将看到程序返回： hello li

继承CConsoleCommand写入自己的命令类,Yii提供了两种方式去执行

1. 如果你执行单一的任务,直接在run方法里面写

class CHelpCommand extends CConsoleCommand
{
/**
* Execute the action.
* @param array $args command line parameters specific for this command
*/
public function run($args)
{
$runner=$this->getCommandRunner();
$commands=$runner->commands;
if(isset($args[0]))
$name=strtolower($args[0]);
if(!isset($args[0]) || !isset($commands[$name]))
{
if(!emptyempty($commands))
{
echo "Yii command runner (based on Yii v".Yii::getVersion().")\n";
echo "Usage: ".$runner->getScriptName()." <command-name> [parameters...]\n";
echo "\nThe following commands are available:\n";
$commandNames=array_keys($commands);
sort($commandNames);
echo ' - '.implode("\n - ",$commandNames);
echo "\n\nTo see individual command help, use the following:\n";
echo " ".$runner->getScriptName()." help <command-name>\n";
}
else
{
echo "No available commands.\n";
echo "Please define them under the following directory:\n";
echo "\t".Yii::app()->getCommandPath()."\n";
}
}
else
echo $runner->createCommand($name)->getHelp();
}
/**
* Provides the command description.
* @return string the command description.
*/
public function getHelp()
{
return parent::getHelp().' [command-name]';
}
}

2. 另外一种就是同写你的Controller(控制器),前面增加actionXXX，例如：

class CleanupCommand extends CConsoleCommand {
private $sessionTableName = 'it_common_session';
/**
* Index Action
*/
public function actionIndex() {
echo "默认动作";
}
/**
* 自动执行清理Session,每2分钟.
*/
public function actionSession() {
$now = time();
$sql="DELETE FROM {$this->sessionTableName} WHERE lastactivity < $now";
$command = Yii::app()->dz->createCommand($sql);
$command->execute();
}
/**
* 清理系统缓存,每天早上7:30
*/
public function actionCache() {
Yii::app()->cache -> flush();
Yii::app()->dbcache -> flush();
Yii::app()->fcache -> flush();
}
/**
* 清除上传临时文件
*/
public function actionTempfiles() {
$dir = Yii::getPathOfAlias('site.frontend.www.uploads.temp').'/';
foreach(glob($dir.'*.*') as $v){
unlink($v);
}
}
}