THINKPHP的cron任务实现

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;    } }

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