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这篇文章主要介绍THINKPHP中cron任务的实现方法，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
THINKPHP的cron计划任务的实现,利用THINKPHP自带的cli,加上数据库执行记录（记录任务的报错,成功）。
在服务器cron定时任务在网站目录(不是网站根目录)执行php cron.php，网站根目录为Public。
写一个cli的入口文件
cli.php
<?php
define('MODE_NAME', 'cli');
// 检测PHP环境
if(version_compare(PHP_VERSION,'5.3.0','<')) die('require PHP > 5.3.0 !');
define('APP_DEBUG', true);
// 定义应用目录
define('APP_PATH', __DIR__ . '/Application/');
// 引入ThinkPHP入口文件
require __DIR__ . '/ThinkPHP/ThinkPHP.php';写一个执行文件
cron.php
define('AUTO_CRON', true);
include __DIR__ . '/cli.php';数据库设计
DROP TABLE IF EXISTS `cron`; CREATE TABLE IF NOT EXISTS `cron` ( `cron_id` int(10) unsigned NOT NULL AUTO_INCREMENT, `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `expression` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `class` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `method` varchar(255) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `type` varchar(30) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `status` varchar(30) COLLATE utf8_unicode_ci NOT NULL DEFAULT '', `created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', `updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00', `run_at` timestamp NULL DEFAULT NULL, `ms` int(10) unsigned NOT NULL DEFAULT '0', `error` text COLLATE utf8_unicode_ci NOT NULL, PRIMARY KEY (`cron_id`), KEY `name` (`name`,`created_at`), KEY `cron_status_index` (`status`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci AUTO_INCREMENT=1 ;
配置文件
<?php return array( 'version' => '1.0.0', 'beastalkd' => array( 'process_untreated_queue' => array( 'expression' => '* * * * *', 'class' => 'Statistics\Model\PheanstalkModel', 'method' => 'processUntreatedQueue' ) ) );
执行文件 init.php
/写个hook程序执行init.php
<?php
use Think\Log, Think\Db, Cron\Model\Cron;
$Model = new \Think\Model();
$Has = !$Model->query("SHOW TABLES LIKE 'cron'")?false:true;
if(defined("AUTO_CRON") && $Has){
class CronCommand
{
protected $_initializedJobs;
protected $_jobs;
protected $_now;
public function __construct()
{
$this->_now = strtotime(date('Y-n-j H:i'));
import("Cron.Common.Cron.tdcron_entry",'','.php');
import("Cron.Common.Cron.tdcron",'','.php');
}
/**
* 这里是放要执行的代码
*/
public function fire()
{
restore_error_handler();
restore_exception_handler();
$this->_initializedJobs = array();
$jobs = M('cron')->where("status = 'initialized'")->select();
/**
* @var $cron Cron
* 已存在 cron
*/
if($jobs) {
$cron = new Cron();
foreach ($jobs as $data) {
$cron->setData($data)->isNew(false);
$this->_initializedJobs[$data['name']] = $cron;
}
}
/**
* 新 cron
*/
foreach ($this->getCronJobs() as $name => $cronJob) {
if (isset($cronJob['expression'])) {
$expression = $cronJob['expression'];
} else {
Log::write('Cron expression is required for cron job "' . $name . '"',Log::WARN);
continue;
}
if ($this->_now != tdCron::getNextOccurrence($expression, $this->_now)) continue;
$cronJob['name'] = $name;
$cron = isset($this->_initializedJobs[$name]) ? $this->_initializedJobs[$name] : $this->_initializedJobs[$name] = new Cron();
$cron->initialize($cronJob);
}
/* @var $cron Cron 处理*/
foreach ($this->_initializedJobs as $cron) {
$cron->run();
}
}
/**
* Get All Defined Cron Jobs
* 获取配置
* @return array
*/
public function getCronJobs()
{
if ($this->_jobs === null) {
$this->_jobs = C('beastalkd');
}
return $this->_jobs;
}
}
$command = new CronCommand();
$command->fire();
}cron 模型
<?php
namespace Cron\Model;
use Common\Model;
use Think\Log;
/**
* Class Cron
* @method string getClass()
* @method string getMethod()
* @method string getName()
* @method string getType()
* @package Cron\Model
*/
class Cron extends Model{
const STATUS_COMPLETED = 'completed';
const STATUS_FAILED = 'failed';
const STATUS_INITIALIZED = 'initialized';
const STATUS_RUNNING = 'running';
protected $name = 'cron';
protected $tableName = 'cron';
protected $pk = 'cron_id';
protected $_originalData = array();
/**
* 保存配置信息CLASS
*/
protected static $_cron_classes = array();
/**
* @param $class
* @return mixed 获取配置的 CLASS
*/
public function getSingleton($class)
{
isset(static::$_cron_classes[$class]) or static::$_cron_classes[$class] = new $class;
return static::$_cron_classes[$class];
}
/**
* @param $cronJob
* @return $this
* 初始化 任务状态
*/
public function initialize($cronJob)
{
foreach ($cronJob as $k => $v) {
$this->setData($k, $v);
}
$now = date('Y-m-d H:i:s');
$this->setData('status',self::STATUS_INITIALIZED)->setData('created_at',$now)->setData('updated_at',$now)->save();
return $this;
}
/**
* @return $this run 命令
*/
public function run()
{
$this->setData('run_at',date('Y-m-d H:i:s'))->setData('status',self::STATUS_RUNNING)->save();
Timer::start();
try {
$class = $this->getData('class');
$method = $this->getData('method');
if (!class_exists($class)) throw new \Exception(sprintf('Class "%s" not found!', $class));
if (!method_exists($class, $method)) throw new \Exception(sprintf('Method "%s::%s()" not found!', $class, $method));
$callback = array($this->getSingleton($class), $method);
//new CLASS 使用操作方法
// 执行配置里的 Statistics\Model\PheanstalkModel类 的 processUntreatedQueue 操作
call_user_func($callback);
Timer::stop();
$this->setData('ms',round(Timer::diff() * 1000))->setData('status',self::STATUS_COMPLETED)->save();
} catch (\Exception $e) {
Timer::stop();
$this->setData('ms',round(Timer::diff() * 1000))
->setData('status',self::STATUS_FAILED)
->setData('error',$e->getMessage() . "\nParams:\n" . var_export($this->getDbFields(), true))->save();
Log::write($e->getMessage() . "\n" . $e->getTraceAsString(),Log::ERR);
}
return $this;
}
}Common\Model 模型
<?php namespace Common; use Think\Model as ThinkModel; /** * Class Model * @package Common * * @property \Think\Db\Driver\Mysql $db DB instance */ abstract class Model extends ThinkModel { protected $_isNew = true; protected $_jsonFields = array(); protected $_originalData = array(); protected function _after_find(&$result, $options) { foreach ($this->_jsonFields as $field) { is_string($_data = fnGet($result, $field)) and $result[$field] = json_decode($_data, true); } $this->_originalData = $result; $this->_isNew = !$result; parent::_after_find($result, $options); } protected function _after_save($result) { } protected function _before_find() { $this->_originalData = array(); } protected function _facade($data) { foreach ($this->_jsonFields as $field) { is_array($_data = fnGet($data, $field)) and $data[$field] = json_encode($_data); } return parent::_facade($data); } public function find($options = array()) { $this->_before_find(); return parent::find($options); } public function getData($key = null) { return $key === null ? $this->data : $this->__get($key); } public function getOptions() { return $this->options; } public function getOriginalData($key = null) { return $key === null ? $this->_originalData : fnGet($this->_originalData, $key); } /** * Get or set isNew flag * * @param bool $flag * * @return bool */ public function isNew($flag = null) { if ($flag !== null) $this->_isNew = (bool)$flag; return $this->_isNew; } public function save($data = '', $options = array()) { if ($this->_isNew) { $oldData = $this->data; $result = $this->add($data, $options); $this->data = $oldData; if ($result && $this->pk && is_string($this->pk)) { $this->setData($this->pk, $result); } $this->_isNew = false; } else { $oldData = $this->data; $result = parent::save($data, $options); $this->data = $oldData; } $this->_after_save($result); return $result; } public function setData($key, $value = null) { is_array($key) ? $this->data = $key : $this->data[$key] = $value; return $this; } }
Timer.class.php
<?php
namespace Cron\Model;
class Timer
{
protected static $_start = array(0, 0);
protected static $_stop = array(0, 0);
public static function diff($start = null, $stop = null)
{
$start and self::start($start);
$stop and self::stop($stop);
return (self::$_stop[0] - self::$_start[0]) + (self::$_stop[1] - self::$_start[1]);
}
public static function start($microtime = null)
{
$microtime or $microtime = microtime();
self::$_start = explode(' ', $microtime);
}
public static function stop($microtime = null)
{
$microtime or $microtime = microtime();
self::$_stop = explode(' ', $microtime);
}
}tdcron.php
<?php
define('IDX_MINUTE', 0);
define('IDX_HOUR', 1);
define('IDX_DAY', 2);
define('IDX_MONTH', 3);
define('IDX_WEEKDAY', 4);
define('IDX_YEAR', 5);
/*
* tdCron v0.0.1 beta - CRON-Parser for PHP
*
* Copyright (c) 2010 Christian Land / tagdocs.de
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
* associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
* NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @author Christian Land <devel@tagdocs.de>
* @package tdCron
* @copyright Copyright (c) 2010, Christian Land / tagdocs.de
* @version v0.0.1 beta
*/
class tdCron
{
/**
* Parsed cron-expressions cache.
* @var mixed
*/
static private $pcron = array();
/**
* getNextOccurrence() uses a cron-expression to calculate the time and date at which a cronjob
* should be executed the next time. If a reference-time is passed, the next time and date
* after that time is calculated.
*
* @access public
* @param string $expression cron-expression to use
* @param int $timestamp optional reference-time
* @return int
* @throws Exception
*/
static public function getNextOccurrence($expression, $timestamp = null)
{
try {
// Convert timestamp to array
$next = self::getTimestamp($timestamp);
// Calculate date/time
$next_time = self::calculateDateTime($expression, $next);
} catch (Exception $e) {
throw $e;
}
// return calculated time
return $next_time;
}
/**
* getLastOccurrence() does pretty much the same as getNextOccurrence(). The only difference
* is, that it doesn't calculate the next but the last time a cronjob should have been executed.
*
* @access public
* @param string $expression cron-expression to use
* @param int $timestamp optional reference-time
* @return int
* @throws Exception
*/
static public function getLastOccurrence($expression, $timestamp = null)
{
try {
// Convert timestamp to array
$last = self::getTimestamp($timestamp);
// Calculate date/time
$last_time = self::calculateDateTime($expression, $last, false);
} catch (Exception $e) {
throw $e;
}
// return calculated time
return $last_time;
}
/**
* calculateDateTime() is the function where all the magic happens :-)
*
* It calculates the time and date at which the next/last call of a cronjob is/was due.
*
* @access private
* @param mixed $expression cron-expression
* @param mixed $rtime reference-time
* @param bool $next true = nextOccurence, false = lastOccurence
* @return int
* @throws Exception
*/
static private function calculateDateTime($expression, $rtime, $next = true)
{
// Initialize vars
$calc_date = true;
// Parse cron-expression (if neccessary)
$cron = self::getExpression($expression, !$next);
// OK, lets see if the day/month/weekday of the reference-date exist in our
// $cron-array.
if (!in_array($rtime[IDX_DAY], $cron[IDX_DAY]) || !in_array($rtime[IDX_MONTH], $cron[IDX_MONTH]) || !in_array($rtime[IDX_WEEKDAY], $cron[IDX_WEEKDAY])) {
// OK, things are easy. The day/month/weekday of the reference time
// can't be found in the $cron-array. This means that no matter what
// happens, we WILL end up at at a different date than that of our
// reference-time. And in this case, the lastOccurrence will ALWAYS
// happen at the latest possible time of the day and the nextOccurrence
// at the earliest possible time.
//
// In both cases, the time can be found in the first elements of the
// hour/minute cron-arrays.
$rtime[IDX_HOUR] = reset($cron[IDX_HOUR]);
$rtime[IDX_MINUTE] = reset($cron[IDX_MINUTE]);
} else {
// OK, things are getting a little bit more complicated...
$nhour = self::findValue($rtime[IDX_HOUR], $cron[IDX_HOUR], $next);
// Meh. Such a cruel world. Something has gone awry. Lets see HOW awry it went.
if ($nhour === false) {
// Ah, the hour-part went wrong. Thats easy. Wrong hour means that no
// matter what we do we'll end up at a different date. Thus we can use
// some simple operations to make things look pretty ;-)
//
// As alreasy mentioned before -> different date means earliest/latest
// time:
$rtime[IDX_HOUR] = reset($cron[IDX_HOUR]);
$rtime[IDX_MINUTE] = reset($cron[IDX_MINUTE]);
// Now all we have to do is add/subtract a day to get a new reference time
// to use later to find the right date. The following line probably looks
// a little odd but thats the easiest way of adding/substracting a day without
// screwing up the date. Just trust me on that one ;-)
$rtime = explode(',', strftime('%M,%H,%d,%m,%w,%Y', mktime($rtime[IDX_HOUR], $rtime[IDX_MINUTE], 0, $rtime[IDX_MONTH], $rtime[IDX_DAY], $rtime[IDX_YEAR]) + ((($next) ? 1 : -1) * 86400)));
} else {
// OK, there is a higher/lower hour available. Check the minutes-part.
$nminute = self::findValue($rtime[IDX_MINUTE], $cron[IDX_MINUTE], $next);
if ($nminute === false) {
// No matching minute-value found... lets see what happens if we substract/add an hour
$nhour = self::findValue($rtime[IDX_HOUR] + (($next) ? 1 : -1), $cron[IDX_HOUR], $next);
if ($nhour === false) {
// No more hours available... add/substract a day... you know what happens ;-)
$nminute = reset($cron[IDX_MINUTE]);
$nhour = reset($cron[IDX_HOUR]);
$rtime = explode(',', strftime('%M,%H,%d,%m,%w,%Y', mktime($nhour, $nminute, 0, $rtime[IDX_MONTH], $rtime[IDX_DAY], $rtime[IDX_YEAR]) + ((($next) ? 1 : -1) * 86400)));
} else {
// OK, there was another hour. Set the right minutes-value
$rtime[IDX_HOUR] = $nhour;
$rtime[IDX_MINUTE] = (($next) ? reset($cron[IDX_MINUTE]) : end($cron[IDX_MINUTE]));
$calc_date = false;
}
} else {
// OK, there is a matching minute... reset minutes if hour has changed
if ($nhour <> $rtime[IDX_HOUR]) {
$nminute = reset($cron[IDX_MINUTE]);
}
// Set time
$rtime[IDX_HOUR] = $nhour;
$rtime[IDX_MINUTE] = $nminute;
$calc_date = false;
}
}
}
// If we have to calculate the date... we'll do so
if ($calc_date) {
if (in_array($rtime[IDX_DAY], $cron[IDX_DAY]) && in_array($rtime[IDX_MONTH], $cron[IDX_MONTH]) && in_array($rtime[IDX_WEEKDAY], $cron[IDX_WEEKDAY])) {
return mktime($rtime[1], $rtime[0], 0, $rtime[3], $rtime[2], $rtime[5]);
} else {
// OK, some searching necessary...
$cdate = mktime(0, 0, 0, $rtime[IDX_MONTH], $rtime[IDX_DAY], $rtime[IDX_YEAR]);
// OK, these three nested loops are responsible for finding the date...
//
// The class has 2 limitations/bugs right now:
//
// -> it doesn't work for dates in 2036 or later!
// -> it will most likely fail if you search for a Feburary, 29th with a given weekday
// (this does happen because the class only searches in the next/last 10 years! And
// while it usually takes less than 10 years for a "normal" date to iterate through
// all weekdays, it can take 20+ years for Feb, 29th to iterate through all weekdays!
for ($nyear = $rtime[IDX_YEAR]; (($next) ? ($nyear <= $rtime[IDX_YEAR] + 10) : ($nyear >= $rtime[IDX_YEAR] - 10)); $nyear = $nyear + (($next) ? 1 : -1)) {
foreach ($cron[IDX_MONTH] as $nmonth) {
foreach ($cron[IDX_DAY] as $nday) {
if (checkdate($nmonth, $nday, $nyear)) {
$ndate = mktime(0, 0, 1, $nmonth, $nday, $nyear);
if (($next) ? ($ndate >= $cdate) : ($ndate <= $cdate)) {
$dow = date('w', $ndate);
// The date is "OK" - lets see if the weekday matches, too...
if (in_array($dow, $cron[IDX_WEEKDAY])) {
// WIN! :-) We found a valid date...
$rtime = explode(',', strftime('%M,%H,%d,%m,%w,%Y', mktime($rtime[IDX_HOUR], $rtime[IDX_MINUTE], 0, $nmonth, $nday, $nyear)));
return mktime($rtime[1], $rtime[0], 0, $rtime[3], $rtime[2], $rtime[5]);
}
}
}
}
}
}
}
throw new Exception('Failed to find date, No matching date found in a 10 years range!', 10004);
}
return mktime($rtime[1], $rtime[0], 0, $rtime[3], $rtime[2], $rtime[5]);
}
/**
* getTimestamp() converts an unix-timestamp to an array. The returned array contains the following values:
*
* [0] -> minute
* [1] -> hour
* [2] -> day
* [3] -> month
* [4] -> weekday
* [5] -> year
*
* The array is used by various functions.
*
* @access private
* @param int $timestamp If none is given, the current time is used
* @return mixed
*/
static private function getTimestamp($timestamp = null)
{
if (is_null($timestamp)) {
$arr = explode(',', strftime('%M,%H,%d,%m,%w,%Y', time()));
} else {
$arr = explode(',', strftime('%M,%H,%d,%m,%w,%Y', $timestamp));
}
// Remove leading zeros (or we'll get in trouble ;-)
foreach ($arr as $key => $value) {
$arr[$key] = (int)ltrim($value, '0');
}
return $arr;
}
/**
* findValue() checks if the given value exists in an array. If it does not exist, the next
* higher/lower value is returned (depending on $next). If no higher/lower value exists,
* false is returned.
*
* @access public
* @param int $value
* @param mixed $data
* @param bool $next
* @return mixed
*/
static private function findValue($value, $data, $next = true)
{
if (in_array($value, $data)) {
return (int)$value;
} else {
if (($next) ? ($value <= end($data)) : ($value >= end($data))) {
foreach ($data as $curval) {
if (($next) ? ($value <= (int)$curval) : ($curval <= $value)) {
return (int)$curval;
}
}
}
}
return false;
}
/**
* getExpression() returns a parsed cron-expression. Parsed cron-expressions are cached to reduce
* unneccessary calls of the parser.
*
* @access public
* @param string $expression
* @param bool $reverse
* @return mixed
* @throws Exception
*/
static private function getExpression($expression, $reverse = false)
{
// First of all we cleanup the expression and remove all duplicate tabs/spaces/etc.
// For example "* * * * *" would be converted to "* * * * *", etc.
$expression = preg_replace('/(\s+)/', ' ', strtolower(trim($expression)));
// Lets see if we've already parsed that expression
if (!isset(self::$pcron[$expression])) {
// Nope - parse it!
try {
self::$pcron[$expression] = tdCronEntry::parse($expression);
self::$pcron['reverse'][$expression] = self::arrayReverse(self::$pcron[$expression]);
} catch (Exception $e) {
throw $e;
}
}
return ($reverse ? self::$pcron['reverse'][$expression] : self::$pcron[$expression]);
}
/**
* arrayReverse() reverses all sub-arrays of our cron array. The reversed values are used for calculations
* that are run when getLastOccurence() is called.
*
* @access public
* @param mixed $cron
* @return mixed
*/
static private function arrayReverse($cron)
{
foreach ($cron as $key => $value) {
$cron[$key] = array_reverse($value);
}
return $cron;
}
}tdcron_entry.php
<?php
/**
* tinyCronEntry is part of tdCron. Its a class to parse Cron-Expressions like "1-45 1,2,3 1-30/5 January,February Mon,Tue"
* and convert it to an easily useable format.
*
* The parser is quite powerful and understands pretty much everything you will ever find in a Cron-Expression.
*
* A Cron-Expression consists of 5 segments:
*
* <pre>
* .---------------- minute (0 - 59)
* | .------------- hour (0 - 23)
* | | .---------- day of month (1 - 31)
* | | | .------- month (1 - 12)
* | | | | .----- day of week (0 - 6)
* | | | | |
* * * * * *
* </pre>
*
* Each segment can contain values, ranges and intervals. A range is always written as "value1-value2" and
* intervals as "value1/value2".
*
* Of course each segment can contain multiple values seperated by commas.
*
* Some valid examples:
*
* <pre>
* 1,2,3,4,5
* 1-5
* 10-20/*
* Jan,Feb,Oct
* Monday-Friday
* 1-10,15,20,40-50/2
* </pre>
*
* The current version of the parser understands all weekdays and month names in german and english!
*
* Usually you won't need to call this class directly.
*
* Copyright (c) 2010 Christian Land / tagdocs.de
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
* associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
* LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
* NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @author Christian Land <devel@tagdocs.de>
* @package tinyCron
* @subpackage tinyCronEntry
* @copyright Copyright (c) 2010, Christian Land / tagdocs.de
* @version v0.0.1 beta
*/
class tdCronEntry
{
/**
* The parsed cron-expression.
* @var mixed
*/
static private $cron = array();
/**
* Ranges.
* @var mixed
*/
static private $ranges = array(
IDX_MINUTE => array('min' => 0, 'max' => 59), // Minutes
IDX_HOUR => array('min' => 0, 'max' => 23), // Hours
IDX_DAY => array('min' => 1, 'max' => 31), // Days
IDX_MONTH => array('min' => 1, 'max' => 12), // Months
IDX_WEEKDAY => array('min' => 0, 'max' => 7) // Weekdays
);
/**
* Named intervals.
* @var mixed
*/
static private $intervals = array(
'@yearly' => '0 0 1 1 *',
'@annually' => '0 0 1 1 *',
'@monthly' => '0 0 1 * *',
'@weekly' => '0 0 * * 0',
'@midnight' => '0 0 * * *',
'@daily' => '0 0 * * *',
'@hourly' => '0 * * * *'
);
/**
* Possible keywords for months/weekdays.
* @var mixed
*/
static private $keywords = array(
IDX_MONTH => array(
'/(january|januar|jan)/i' => 1,
'/(february|februar|feb)/i' => 2,
'/(march|maerz|m?rz|mar|mae|m?r)/i' => 3,
'/(april|apr)/i' => 4,
'/(may|mai)/i' => 5,
'/(june|juni|jun)/i' => 6,
'/(july|juli|jul)/i' => 7,
'/(august|aug)/i' => 8,
'/(september|sep)/i' => 9,
'/(october|oktober|okt|oct)/i' => 10,
'/(november|nov)/i' => 11,
'/(december|dezember|dec|dez)/i' => 12
),
IDX_WEEKDAY => array(
'/(sunday|sonntag|sun|son|su|so)/i' => 0,
'/(monday|montag|mon|mo)/i' => 1,
'/(tuesday|dienstag|die|tue|tu|di)/i' => 2,
'/(wednesdays|mittwoch|mit|wed|we|mi)/i' => 3,
'/(thursday|donnerstag|don|thu|th|do)/i' => 4,
'/(friday|freitag|fre|fri|fr)/i' => 5,
'/(saturday|samstag|sam|sat|sa)/i' => 6
)
);
/**
* parseExpression() analyses crontab-expressions like "* * 1,2,3 * mon,tue" and returns an array
* containing all values. If it can't be parsed, an exception is thrown.
*
* @access public
* @param string $expression The cron-expression to parse.
* @return mixed
* @throws Exception
*/
static public function parse($expression)
{
$dummy = array();
// Convert named expressions if neccessary
if (substr($expression, 0, 1) == '@') {
$expression = strtr($expression, self::$intervals);
if (substr($expression, 0, 1) == '@') {
// Oops... unknown named interval!?!!
throw new Exception('Unknown named interval [' . $expression . ']', 10000);
}
}
// Next basic check... do we have 5 segments?
$cron = explode(' ', $expression);
if (count($cron) <> 5) {
// No... we haven't...
throw new Exception('Wrong number of segments in expression. Expected: 5, Found: ' . count($cron), 10001);
} else {
// Yup, 5 segments... lets see if we can work with them
foreach ($cron as $idx => $segment) {
try {
$dummy[$idx] = self::expandSegment($idx, $segment);
} catch (Exception $e) {
throw $e;
}
}
}
return $dummy;
}
/**
* expandSegment() analyses a single segment
*
* @access public
* @param $idx
* @param $segment
* @return array
* @throws Exception
*/
static private function expandSegment($idx, $segment)
{
// Store original segment for later use
$osegment = $segment;
// Replace months/weekdays like "January", "February", etc. with numbers
if (isset(self::$keywords[$idx])) {
$segment = preg_replace(array_keys(self::$keywords[$idx]), array_values(self::$keywords[$idx]), $segment);
}
// Replace wildcards
if (substr($segment, 0, 1) == '*') {
$segment = preg_replace('/^\*(\/\d+)?$/i', self::$ranges[$idx]['min'] . '-' . self::$ranges[$idx]['max'] . '$1', $segment);
}
// Make sure that nothing unparsed is left :)
$dummy = preg_replace('/[0-9\-\/\,]/', '', $segment);
if (!empty($dummy)) {
// Ohoh.... thats not good :-)
throw new Exception('Failed to parse segment: ' . $osegment, 10002);
}
// At this point our string should be OK - lets convert it to an array
$result = array();
$atoms = explode(',', $segment);
foreach ($atoms as $curatom) {
$result = array_merge($result, self::parseAtom($curatom));
}
// Get rid of duplicates and sort the array
$result = array_unique($result);
sort($result);
// Check for invalid values
if ($idx == IDX_WEEKDAY) {
if (end($result) == 7) {
if (reset($result) <> 0) {
array_unshift($result, 0);
}
array_pop($result);
}
}
foreach ($result as $key => $value) {
if (($value < self::$ranges[$idx]['min']) || ($value > self::$ranges[$idx]['max'])) {
throw new Exception('Failed to parse segment, invalid value [' . $value . ']: ' . $osegment, 10003);
}
}
return $result;
}
/**
* parseAtom() analyses a single segment
*
* @access public
* @param string $atom The segment to parse
* @return array
*/
static private function parseAtom($atom)
{
$expanded = array();
if (preg_match('/^(\d+)-(\d+)(\/(\d+))?/i', $atom, $matches)) {
$low = $matches[1];
$high = $matches[2];
if ($low > $high) {
list($low, $high) = array($high, $low);
}
$step = isset($matches[4]) ? $matches[4] : 1;
for ($i = $low; $i <= $high; $i += $step) {
$expanded[] = (int)$i;
}
} else {
$expanded[] = (int)$atom;
}
$expanded2 = array_unique($expanded);
return $expanded;
}
}以上是“THINKPHP中cron任务的实现方法”这篇文章的所有内容，感谢各位的阅读！希望分享的内容对大家有帮助，更多相关知识，欢迎关注亿速云行业资讯频道！
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