php5.3下使用php管理crontab计划任务
php5.3或以上版本可以使用php管理crontab计划任务,下面我先来体验一下,有需要学习了解的朋友可进入参考.
1.使用php-crontab-manager管理计划任务
要求 PHP>=5.3,使用方法举例,代码如下:
use phpmanagercrontabCrontabManager; $crontab = new CrontabManager(); $crontab->enableOrUpdate('/tmp/my/crontab.txt'); $crontab->save();
添加一个简单的计划任务,代码如下:
use phpmanagercrontabCrontabManager; $crontab = new Ssh2_crontab_manager(); $job = $crontab->newJob(); $job->on('* * * * *'); $job->onMinute('20-30')->doJob("echo foo"); $crontab->add($job); $job->onMinute('35-40')->doJob("echo bar"); $crontab->add($job); $crontab->save();
php类文件,代码如下:
<?php Class Ssh2_crontab_manager { private $connection; private $path; private $handle; private $cron_file; function __construct($host = NULL, $port = NULL, $username = NULL, $password = NULL) { $path_length = strrpos(__FILE__, "/"); $this->path = substr(__FILE__, 0, $path_length) . '/'; $this->handle = 'crontab.txt'; $this->cron_file = "{$this->path}{$this->handle}"; try { if (is_null($host) || is_null($port) || is_null($username) || is_null($password)) throw new Exception("The host, port, username and password arguments must be specified!"); $this->connection = @ssh2_connect($host, $port); if (!$this->connection) throw new Exception("The SSH2 connection could not be established."); $authentication = @ssh2_auth_password($this->connection, $username, $password); if (!$authentication) throw new Exception("Could not authenticate '{$username}' using pasword: '{$password}'."); } catch(Exception $e) { $this->error_message($e->getMessage()); } } public function exec() { $argument_count = func_num_args(); try { if (!$argument_count) throw new Exception("There is nothing to exececute, no arguments specified."); $arguments = func_get_args(); $command_string = ($argument_count > 1) ? implode(" && ", $arguments) : $arguments[0]; $stream = @ssh2_exec($this->connection, $command_string); if (!$stream) throw new Exception("Unable to execute the specified commands: <br />{$command_string}"); } catch(Exception $e) { $this->error_message($e->getMessage()); } return $this; } public function write_to_file($path = NULL, $handle = NULL) { if (!$this->crontab_file_exists()) { $this->handle = (is_null($handle)) ? $this->handle : $handle; $this->path = (is_null($path)) ? $this->path : $path; $this->cron_file = "{$this->path}{$this->handle}"; $init_cron = "crontab -l > {$this->cron_file} && [ -f {$this->cron_file} ] || > {$this->cron_file}"; $this->exec($init_cron); } return $this; } public function remove_file() { if ($this->crontab_file_exists()) $this->exec("rm {$this->cron_file}"); return $this; } public function append_cronjob($cron_jobs = NULL) { if (is_null($cron_jobs)) $this->error_message("Nothing to append! Please specify a cron job or an array of cron jobs."); $append_cronfile = "echo '"; $append_cronfile.= (is_array($cron_jobs)) ? implode("n", $cron_jobs) : $cron_jobs; $append_cronfile.= "' >> {$this->cron_file}"; $install_cron = "crontab {$this->cron_file}"; $this->write_to_file()->exec($append_cronfile, $install_cron)->remove_file(); return $this; } public function remove_cronjob($cron_jobs = NULL) { if (is_null($cron_jobs)) $this->error_message("Nothing to remove! Please specify a cron job or an array of cron jobs."); $this->write_to_file(); $cron_array = file($this->cron_file, FILE_IGNORE_NEW_LINES); if (emptyempty($cron_array)) { $this->remove_file()->error_message("Nothing to remove! The cronTab is already empty."); } $original_count = count($cron_array); if (is_array($cron_jobs)) { foreach ($cron_jobs as $cron_regex) $cron_array = preg_grep($cron_regex, $cron_array, PREG_GREP_INVERT); } else { $cron_array = preg_grep($cron_jobs, $cron_array, PREG_GREP_INVERT); } return ($original_count === count($cron_array)) ? $this->remove_file() : $this->remove_crontab()->append_cronjob($cron_array); } public function remove_crontab() { $this->remove_file()->exec("crontab -r"); return $this; } private function crontab_file_exists() { //开源代码phprm.com return file_exists($this->cron_file); } private function error_message($error) { die("<pre style='color:#EE2711'>ERROR: {$error}
项目地址:https://github.com/MediovskiTechnology/php-crontab-manager
2.Ssh2_crontab_manager 关于php管理计划任务的详细教程
具体内容参考:http://net.tutsplus.com/tutorials/php/managing-cron-jobs-with-php-2/
参考资料:http://stackoverflow.com/questions/4421020/use-php-to-create-edit-and-delete-crontab-jobs

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