php5.3下使用php管理crontab计划任务

use phpmanagercrontabCrontabManager; 
$crontab = new CrontabManager(); 
$crontab->enableOrUpdate('/tmp/my/crontab.txt'); 
$crontab->save();

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
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) . &#39;/&#39;;
        $this->handle = &#39;crontab.txt&#39;;
        $this->cron_file = "{$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 &#39;{$username}&#39; using pasword: &#39;{$password}&#39;.");
        }
        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 &#39;";
        $append_cronfile.= (is_array($cron_jobs)) ? implode("n", $cron_jobs) : $cron_jobs;
        $append_cronfile.= "&#39;  >> {$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($error) {
        die("<pre style=&#39;color:#EE2711&#39;>ERROR: {$error}