blocks|key|3048244|text|PHP限制是设置的，它计算(至少在Linux上)+进程在工作时所花费的时间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3048245|引用set_time_limit()手册的页面：|offset|length|style|CODE|3048246|3048247|+注意：+set_time_limit()函数和配置指令max_execution_time+只影响脚本本身的执行时间。|blockquote|BOLD|3048248|3048249|在确定脚本运行的最长时间时，不包括在脚本执行之外发生的活动上花费的任何时间，例如使用system()的系统调用、流操作、数据库查询等。|3048250|在Windows上不是这样的，因为测量的时间是真实的。|3048251|3048252|当你使用sleep()时，你的PHP脚本不能工作:它只是在等待...因此，您等待的5秒不会被计入max_execution_time限制。|3048253|entityMap^0|0|2|G|0|0|1|3|1B|C|5|G|S|I|0|0|16|8|0|0|0|4|7|1C|I|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|11|8|@$D|12|E|13|F|L]|$D|14|E|15|F|L]|$D|16|E|17|F|G]|$D|18|E|19|F|G]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1B|8|@$D|1C|E|1D|F|G]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1E|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|1G|8|@$D|1H|E|1I|F|G]|$D|1J|E|1K|F|G]]|9|@]|A|$]]|$1|U|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|V|$]]

The <a href="http://fr.php.net/manual/en/info.configuration.php#ini.max-execution-time" rel="noreferrer"><code>max_execution_time</code></a> limit, which is what <a href="http://fr.php.net/set_time_limit" rel="noreferrer"><code>set_time_limit</code></a> sets, counts (at least, on Linux) the time that is spent by the PHP process, while working.

Quoting the manual's page of <code>set_time_limit()</code> :

<blockquote>
 Note: The <code>set_time_limit()</code> function and the configuration
 directive <code>max_execution_time</code> only
 affect the execution time of the
 script itself. Any time spent on
 activity that happens outside the
 execution of the script such as system
 calls using <code>system()</code>, stream
 operations, database queries, etc. is
 not included when determining the
 maximum time that the script has been
 running. This is not true on
 Windows where the measured time is
 real.
</blockquote>

When, you are using <code>sleep()</code>, your PHP script is not working : it's just waiting... So the 5 seconds you are waiting are not being taken into account by the <code>max_execution_time</code> limit.

blocks|key|338761|text|非常黑客，但由于我经常使用cli脚本，我承认我在过去也有过类似的黑客行为。需要2个脚本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|338762|您的第一个cron脚本(挂起的那个脚本)将其启动时间和进程in记录在一个平面文件->中，函数getmypid将为您提供此功能。从cron每(x)分钟运行的第二个脚本检查平面文件，终止任何超过分配的执行时间的内容，清除平面文件，甚至在需要的情况下登录到另一个文件。|338763|祝你好运;)|338764|更新：|offset|length|style|BOLD|338765|记住了这个问题，并回来张贴这篇文章。在浏览塞巴斯蒂安·伯格曼的github账户时，我偶然发现了php-invoker。用作者的话说：|338766|用于在超时时调用|338767|可调函数的PHP类。|blockquote|338768|338769|虽然目前的答案对于基于linux的非便携应用来说是非常好的，但是如果需要跨平台的解决方案，这个解决方案应该是windows兼容的，对于那些在windoze上运行的可怜的人来说。Bergmann先生是PHP之神，我完全保证脚本的质量。|338770|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/sebastianbergmann/php-invoker^0|0|0|0|0|3|0|1B|B|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|15|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|16|8|@$H|17|I|18|J|K]]|9|@]|A|$]]|$1|L|3|M|5|6|7|19|8|@]|9|@$H|1A|I|1B|1|1C]]|A|$]]|$1|N|3|O|5|6|7|1D|8|@]|9|@]|A|$]]|$1|P|3|Q|5|R|7|1E|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1G|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]]|W|$X|$5|Y|Z|10|A|$11|12]]]]

Very hackish, but since I use cli scripts a lot, I admit shamefully to having slapped up a similar hack in the past. 2 scripts needed. 

Your first cron script (the one that hangs) logs its starttime and processid in a flat file -> the function getmypid will be your friend for this. A second script run from cron every (x) minutes checks the flatfile, kills whatever has passed the alloted execution time, clears the flatfile and even logs in another file if you want.

Good luck ;)

UPDATE:

Remembered this question and came back to post this. While rummaging through Sebastian Bergmann's github account I stumbled on <a href="https://github.com/sebastianbergmann/php-invoker" rel="nofollow">php-invoker</a>. In the words of the author:

<blockquote>
 <blockquote>
 Utility class for invoking PHP callables with a timeout.
 </blockquote>
</blockquote>

Although the current answer is very good for linux based non portable use, if cross-platform solution is needed this solution should be windows compatible, for those poor souls running on windoze. Mr Bergmann being a PHP god, I totally vouch for the quality of the script.

blocks|key|1640045|text|你能试着通过exec运行你的php并使用"timeout“命令吗？(http://packages.ubuntu.com/lucid/timeout)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1640046|用法:+timeout+-signal+time命令。|1640047|entityMap|0|LINK|mutability|MUTABLE|url|http://packages.ubuntu.com/lucid/timeout^0|Y|14|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Could you try running your php via exec and use the "timeout" command? (http://packages.ubuntu.com/lucid/timeout)

usage: timeout [-signal] time command.

blocks|key|1640089|text|我认为脚本挂在某个地方的某个循环中。为什么不简单地在脚本启动时执行$STARTUP_TIME=time()，然后在脚本需要退出时继续检查循环？|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1640090|entityMap^0|X|K|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

I'm ssuming that the script hangs in a loop somewhoere. Why not simply do a <code>$STARTUP_TIME=time()</code> the the script start, and then keep checking in the loop if the script neeeds to exit?

blocks|key|1640156|text|这里的解决方案是使用pcntl_fork()。恐怕这只是POSIX。PHP需要使用--enable-pcntl而不是--disable-posix进行编译。您的代码应该如下所示：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1640157|<?php

function+done($signo)
{
++++//+You+can+do+any+on-success+clean-up+here.
++++die('Success!');
}

$pid+=+pcntl_fork();
if+(-1+==+$pid)+{
++++die('Failed!+Unable+to+fork.');
}+elseif+($pid+>+0)+{
++++pcntl_signal(SIGALRM,+'done');
++++sleep($timeout);
++++posix_kill($pid,+SIGKILL);
++++//+You+can+do+any+on-failure+clean-up+here.
++++die('Failed!+Process+timed+out+and+was+killed.');
}+else+{
++++//+You+can+perform+whatever+time-limited+operation+you+want+here.
++++exec($cmd);
++++posix_kill(posix_getppid(),+SIGALRM);
}

?>|code-block|syntax|javascript|1640158|基本上，它所做的是派生一个运行else+{+...+}块的新进程。在(成功)结束时，我们向正在运行elseif+($pid+>+0)+{+...+}块的父进程发回一个警报。该块有一个已注册的信号处理程序，用于成功终止的报警信号(+done()回调)。在接收到该消息之前，父进程将休眠。当超时sleep()完成时，它会向(可能挂起的)子进程发送一个SIGKILL。|1640159|entityMap^0|A|C|15|E|1M|F|0|0|F|C|1D|P|37|6|41|7|4T|7|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]|$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|N|$]]

The solution here is to use <code>pcntl_fork()</code>. I'm afraid it's POSIX only. PHP will need to be compiled with <code>--enable-pcntl</code> and not <code>--disable-posix</code>. Your code should look something like this:

<pre><code>&lt;?php

function done($signo)
{
 // You can do any on-success clean-up here.
 die('Success!');
}

$pid = pcntl_fork();
if (-1 == $pid) {
 die('Failed! Unable to fork.');
} elseif ($pid &gt; 0) {
 pcntl_signal(SIGALRM, 'done');
 sleep($timeout);
 posix_kill($pid, SIGKILL);
 // You can do any on-failure clean-up here.
 die('Failed! Process timed out and was killed.');
} else {
 // You can perform whatever time-limited operation you want here.
 exec($cmd);
 posix_kill(posix_getppid(), SIGALRM);
}

?&gt;
</code></pre>

Basically what this does is fork a new process which runs the <code>else { ... }</code> block. At the (successful) conclusion of that we send an alarm back to the parent process, which is running the <code>elseif ($pid &gt; 0) { ... }</code> block. That block has a registered signal handler for the alarm signal (the <code>done()</code> callback) which terminates successfully. Until that is received, the parent process sleeps. When the timeout <code>sleep()</code> is complete, it sends a <code>SIGKILL</code> to the (presumably hung) child process.

blocks|key|3048534|text|编辑1|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3048535|我注意到PHP手册中有这样一条注释：|3048536|3048537|请注意，在Linux下，休眠时间会被忽略，但在Windows下，休眠时间会计入执行时间。|blockquote|3048538|3048539|3048540|据我所知，睡眠是作为系统调用实现的，因此被PHP+as+described+in+the+manual忽略。|offset|length|3048541|编辑2|3048542|3048543|那里运行的是exec()，而不是sleep()。而且一些exec()程序会无限期地挂起。我也在寻找在exec+(在linux+shell上)中杀死它，比如exec(kill_after15secs+myscript.sh)，但我似乎也找不到|3048544|3048545|3048546|我现在看到了实际的问题。假设您在Lunix/Unix环境中工作，您可以围绕以下几行设计一个解决方案：|3048547|<?php+$pid+=+system(+'sh+test.sh+>test-out.txt+2>&1+&+echo+$!'+);+?>|code-block|syntax|javascript|3048548|猜猜发生了什么，这捕获了您启动的进程的进程id。您可以将其与时间戳一起记录到数据库或文本文件中。在另一个每5分钟运行一次的cron脚本中，检索5分钟前创建的所有进程ids，并检查它们是否仍在运行：|3048549|<?php+$status+=+system(+'ps+'+.+$pid+);+?>|3048550|如果进程仍在运行，则会得到两行输出：|3048551|+PID+TTY+STAT+TIME+COMMAND
2044+?+++S++++0:29+sh+test.sh|3048552|如果是，则按如下方式终止：|3048553|<?php+system(+'kill+'+.+$pid+);+?>|3048554|我写了一篇关于creating+background+processes+in+PHP的文章(之后我会找到他们)。所有的例子都是从那里复制过来的。|3048555|编辑3|3048556|所有的点连接在一起：|3048557|<?php
++++$pid+=+system(+'sh+test.sh+>test-out.txt+2>&1+&+echo+$!'+);
++++$timer+=+300;
++++while(+--$timer+)+{
++++++++sleep(1);
++++++++$status+=+system(+'ps+'+.+$pid+);
++++++++$status+=+explode(+"\n",+$status,+2+);+//+I+am+not+sure,+please+experiment+a+bit+here
++++++++if+(+count(+$status+)+==+1+%7C%7C+trim(+$status[+1+]+)+==+''+)+{
++++++++++++die(+'spawned+process+ended+successfully'+);
++++++++}
++++}
++++system(+'kill+'+.+$pid+);
++++die(+'spawned+process+was+terminated'+);
?>|3048558|entityMap|0|LINK|mutability|MUTABLE|url|https://www.php.net/manual/en/info.configuration.php#ini.max-execution-time|1|https://salman-w.blogspot.com/2010/04/running-background-process-in-php.html^0|0|0|0|0|0|0|P|Q|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|7|10|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1W|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|1X|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|1Y|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|20|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|21|8|@]|9|@$L|22|M|23|1|24]]|A|$]]|$1|N|3|O|5|6|7|25|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|26|8|@]|9|@]|A|$]]|$1|Q|3|R|5|G|7|27|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|28|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|29|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|2A|8|@]|9|@]|A|$]]|$1|W|3|X|5|Y|7|2B|8|@]|9|@]|A|$Z|10]]|$1|11|3|12|5|6|7|2C|8|@]|9|@]|A|$]]|$1|13|3|14|5|Y|7|2D|8|@]|9|@]|A|$Z|10]]|$1|15|3|16|5|6|7|2E|8|@]|9|@]|A|$]]|$1|17|3|18|5|Y|7|2F|8|@]|9|@]|A|$Z|10]]|$1|19|3|1A|5|6|7|2G|8|@]|9|@]|A|$]]|$1|1B|3|1C|5|Y|7|2H|8|@]|9|@]|A|$Z|10]]|$1|1D|3|1E|5|6|7|2I|8|@]|9|@$L|2J|M|2K|1|2L]]|A|$]]|$1|1F|3|1G|5|6|7|2M|8|@]|9|@]|A|$]]|$1|1H|3|1I|5|6|7|2N|8|@]|9|@]|A|$]]|$1|1J|3|1K|5|Y|7|2O|8|@]|9|@]|A|$Z|10]]|$1|1L|3|-4|5|6|7|2P|8|@]|9|@]|A|$]]]|1M|$1N|$5|1O|1P|1Q|A|$1R|1S]]|1T|$5|1O|1P|1Q|A|$1R|1U]]]]

<h1>EDIT 1</h1>

I noticed this comment in PHP manual:

<blockquote>
 Please note that, under Linux,
 sleeping time is ignored, but under
 Windows, it counts as execution time.
</blockquote>

As far as what I understand, sleep is implemented as a system call and therefore ignored by PHP <a href="https://www.php.net/manual/en/info.configuration.php#ini.max-execution-time" rel="nofollow noreferrer">as described in the manual</a>.

<h1>EDIT 2</h1>

<blockquote>
 there is an exec() running instead of
 sleep() there. and some exec() stuff
 hangs indefinitely. i am also
 searching for killing it from within
 exec (on linux shell), like
 exec(kill_after15secs myscript.sh),
 but i can't seem to find that either
</blockquote>

I now see the actual question. Assuming that you're working in a Lunix/Unix environment, you can devise a solution around these lines:

<pre><code>&lt;?php $pid = system( 'sh test.sh &gt;test-out.txt 2&gt;&amp;1 &amp; echo $!' ); ?&gt;
</code></pre>

Guess what, this captured the process id of the process you started. You can log it into a database or text file along with timestamp. In another cron script that runs, say, every 5 minutes, retrieve all process ids that were created 5 minutes ago and check if they are still running:

<pre><code>&lt;?php $status = system( 'ps ' . $pid ); ?&gt;
</code></pre>

If process is still running, you get two lines of output:

<pre><code> PID TTY STAT TIME COMMAND
2044 ? S 0:29 sh test.sh
</code></pre>

If so, terminate it like this:

<pre><code>&lt;?php system( 'kill ' . $pid ); ?&gt;
</code></pre>

I wrote an article about <a href="https://salman-w.blogspot.com/2010/04/running-background-process-in-php.html" rel="nofollow noreferrer">creating background processes in PHP</a> (and hunt them down afterwards). All examples were copied from there.

<h1>EDIT 3</h1>

All dots connected together:

<pre><code>&lt;?php
 $pid = system( 'sh test.sh &gt;test-out.txt 2&gt;&amp;1 &amp; echo $!' );
 $timer = 300;
 while( --$timer ) {
 sleep(1);
 $status = system( 'ps ' . $pid );
 $status = explode( "\n", $status, 2 ); // I am not sure, please experiment a bit here
 if ( count( $status ) == 1 || trim( $status[ 1 ] ) == '' ) {
 die( 'spawned process ended successfully' );
 }
 }
 system( 'kill ' . $pid );
 die( 'spawned process was terminated' );
?&gt;
</code></pre>

How to solve set_time_limit not affecting PHP-CLI?

<pre><code>#!/usr/bin/php -q 
&lt;?php
set_time_limit(2);
sleep(5); // actually, exec() call that takes &gt; 2 seconds
echo "it didn't work again";
</code></pre>

set_time_limit is not affecting PHP-CLI

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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如何解决set_time_limit不影响PHP-CLI的问题？#!/usr/bin/php -q <?phpset_time_limit(2);sleep(5); // actually, exec() call that takes > 2 secondsecho "it didn't work again";

问set_time_limit没有影响PHP
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