blocks|key|951316|text|使用pear包System_Daemon|type|unstyled|depth|inlineStyleRanges|entityRanges|data|951317|http://pear.php.net/package/System_Daemon/|offset|length|951318|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|16|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

Use the pear package, System_Daemon

<a href="http://pear.php.net/package/System_Daemon/" rel="noreferrer">http://pear.php.net/package/System_Daemon/</a>

blocks|key|2781553|text|试试Unix的cron。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2781554|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Cron^0|7|4|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Try Unix's <a href="http://en.wikipedia.org/wiki/Cron" rel="nofollow noreferrer">cron</a>.

blocks|key|2781567|text|您将需要一些外部服务来执行脚本。在Unix机器上，这应该是cron。在Windows机器上，使用Task+Scheduler。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2781568|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Cron|1|http://en.wikipedia.org/wiki/Task_Scheduler^0|T|4|0|1C|E|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

You'll need some external service to execute the script. On a Unix box, that would be <a href="http://en.wikipedia.org/wiki/Cron" rel="nofollow noreferrer">cron</a>. On a Windows box, use <a href="http://en.wikipedia.org/wiki/Task_Scheduler" rel="nofollow noreferrer">Task Scheduler</a>.

blocks|key|1373217|text|您是否考虑过将您的进程编写为服务器守护进程。它将启动并永远在while循环中运行。每隔几分钟，或者你想要的频率，它可以检查下x分钟的运行时间。您将请求排入队列，每当该时间到来时，您就启动需要运行的脚本。我不认为cron是你想要的，因为你试图在任意的时间安排未来的事件……我相信这就是你现在每秒都在尝试检查数据库的方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1373218|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Have you thought about writing your process as a server daemon. It would start up and run in a while loop forever. Every few minutes or however often you'd like it could check the next x minutes of run times. You queue up your requests and whenever that time comes around you kick off the script you need to run. I don't think cron is what you'd want since you are trying to schedule future events at arbitrary times... And I'm sure it's what you are currently using to try and check the db every second.

blocks|key|954001|text|您必须使用sleep(arg)函数暂停PHP脚本一段给定的时间，然后继续。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|954002|sleep(50);+//Pauses

myFunction();+//Runs+after+the+pause|code-block|syntax|javascript|954003|例如，这会使脚本暂停50秒。|954004|entityMap^0|5|A|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

You must use the <code>sleep(arg)</code> function that pauses the PHP script for a given time and then continues.

<pre><code>sleep(50); //Pauses

myFunction(); //Runs after the pause
</code></pre>

For example, this pauses the script for 50 seconds.

blocks|key|2781729|text|编写一个PHP脚本以读取数据库，并将条目添加到crontab以使脚本在所需的时间运行|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2781730|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Write a PHP script to read from the database and add entries to your crontab to make the script run at the desired time

blocks|key|1373369|text|保持进程运行不是一个很好的解决方案，尤其是因为您需要确保它不会继续运行。假设您知道下一次发生的时间-所以使用“atd”来安排它-当触发时，脚本也应该工作，何时以及如何安排下一次作业。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1373370|这确实意味着作业是链式的--一个作业的失败会破坏链条，而且大多数atd实现的粒度可能会相当高。|1373371|您可能希望考虑使用更复杂的调度工具，如Nagios或进程监视类型的方法，如DJB的daemontools或Oracle的OPMN。|1373372|结果表明，C.|1373373|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Keeping a process running is not a very good solution, not least because you'll need to ensure it does keep running. Presumably you know when the next occurrence is going to happen - so use the 'atd' to schedule it - when triggered the script should also work when and how to schedule the next job.

This does mean that jobs are chained - and failure of one breaks the chain, also the granularity of most implementations of atd can be rather high.

You might want to look at using a more sophisticated scheduling tool like Nagios or a process monitoring type approach like DJB's daemontools or Oracle's OPMN.

C.

blocks|key|205542|text|DJB的DAEMONTOOLS很棒。显然，systemd和/或Upstart也是如此，尽管Remnant扮演了一个真正的笨蛋。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|205543|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

DJB's DAEMONTOOLS is great. So, apparently, is systemd and/or Upstart, though Remnant plays a true wanker.

blocks|key|2781835|text|推荐的Pear包-+system_daemon看起来很棒。然而，作者现在建议使用Ubuntu中现成的新功能:+upstart|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2781836|请参阅his+article+on+his+own+blog+from+2012|offset|length|2781837|entityMap|0|LINK|mutability|MUTABLE|url|http://kvz.io/blog/2009/01/09/create-daemons-in-php/^0|0|3|11|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

The recommended Pear package - system_daemon looks great. However, the author now recommends to use new functionality that's readily available in Ubuntu: upstart

See <a href="http://kvz.io/blog/2009/01/09/create-daemons-in-php/" rel="nofollow">his article on his own blog from 2012</a>

I have a database in MySQL which have entries of time. There are more than 1000 entries of time. I want to extract time and run a PHP script exactly at that time..

I have tried to run a PHP script continuously which check the time, but my server does not allow to run the script for more than 60 seconds.

EDIT. I have to check the database every second. Is there any alternative?

Run PHP script continuously

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我在MySQL中有一个数据库，其中有时间条目。有超过1000个时间条目。我想提取时间并在那个时候运行一个PHP脚本。我尝试连续运行PHP脚本来检查时间，但我的服务器不允许运行超过60秒的脚本。编辑。我必须每秒钟检查一次数据库。还有别的选择吗？

问连续运行PHP脚本
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