set_time_limit

(PHP 4, PHP 5)

set_time_limit — Limits the maximum execution time

Описание

void set_time_limit ( int $seconds )

Set the number of seconds a script is allowed to run. If this is reached, the script returns a fatal error. The default limit is 30 seconds or, if it exists, the max_execution_time value defined in the php.ini.

When called, set_time_limit() restarts the timeout counter from zero. In other words, if the timeout is the default 30 seconds, and 25 seconds into script execution a call such as set_time_limit(20) is made, the script will run for a total of 45 seconds before timing out.

Список параметров

seconds

The maximum execution time, in seconds. If set to zero, no time limit is imposed.

Возвращаемые значения

Эта функция не возвращает значения после выполнения.

Примечания

Внимание

This function has no effect when PHP is running in безопасный режим. There is no workaround other than turning off safe mode or changing the time limit in the php.ini.

Замечание: The set_time_limit() function and the configuration directive max_execution_time 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 system(), stream operations, database queries, etc. is not included when determining the maximum time that the script has been running.

Смотрите также

Коментарии

When you are working with IIS, PHP timeout is valid only when it's lower than script timeout defined by IIS.

IIS 5 has a default timeout of 300 seconds. If you need a higher timeout, you also have to change IIS properties. Otherwise, your server will stop your PHP script before it reaches its own timeout.
2003-05-30 07:28:34
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
You may also need to look at Apache's timeout setting (Win32 version for me), I changed max execution time value in php.ini, and still got stopped by Apache's timeout value in the httpd.conf file.
2003-06-26 16:30:13
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
I was having trouble with script timeouts in applications where the user prompted long running background actions. I wrote this cURL/CLI background script that solved the problem when making requests from HTTP.

<?php

/* BACKGROUND CLI 1.0
   
   eric pecoraro _at_ shepard dot com - 2005-06-02
   Use at your own risk. No warranties expressed or implied.

   Include this file at the top of any script to run it in the background
   with no time limitations ... e.g., include('background_cli.php');
   
   The script that calls this file should not return output to the browser. 
*/
#  REQUIREMENTS - cURL and CLI
   
if ( !function_exists('curl_setopt') OR !function_exists('curl_setopt')  ) {
      echo 
'Requires cURL and CLI installations.' ; exit ; 
   }
   
#  BUILD PATHS
   
$script array_pop(explode('/',$SCRIPT_NAME)) ; 
   
$script_dir substr($SCRIPT_NAME,0,strlen($SCRIPT_NAME)-strlen($script)) ;
   
$scriptURL 'http://'$HTTP_HOST $script_dir "$script;
   
$curlURL 'http://'$HTTP_HOST $script_dir "$script?runscript=curl" ;

#  Indicate that script is being called by CLI 
   
if ( php_sapi_name() == 'cli' ) {
     
$CLI true ;
   }

#  Action if script is being called by cURL_prompt()
   
if ( $runscript == 'curl' ) {
     
$cmd "/usr/local/bin/php ".$PATH_TRANSLATED // server location of script to run
     
exec($cmd) ;
      exit;
   }

#  USER INTERFACE
   // User answer after submission.
   
if ( $post ) {
     
cURL_prompt($curlURL) ;
      echo 
'<div style="margin:25px;"><title>Background CLI</title>';
      echo 
'O.K. If all goes well, <b>'.$script.'</b> is working hard in the background with no ' ;
      echo 
'timeout limitations. <br><br><form action='.$scriptURL.' method=GET>' ;
      echo 
'<input type=submit value=" RESET BACKGROUND CLI "></form></div>' ;
      exit ;
   }
   
// Start screen.
   
if ( !$CLI AND !$runscript ) {
      echo 
'<title>Background CLI</title><div style="margin:25px;">' ;
      echo 
'<form action='.$scriptURL.' method=POST>' ;
      echo 
'Click to run <b>'.$script.'</b> from the PHP CLI command line, in the background.<br><br>' ;
      echo 
'<input type=hidden value=1 name=post>' ;
      echo 
'<input type=submit value=" RUN IN BACKGROUND "></form></div>' ;
      exit ;
   }

#  cURL URL PROMPT FUNCTION
   
function cURL_prompt($url_path) {
     
ob_start(); // start output buffer
     
$c=curl_init($url_path);
     
curl_setopt($cCURLOPT_TIMEOUT2); // drop connection after 2 seconds
     
curl_exec($c);
     
curl_close($c);
     
ob_end_clean(); // discard output buffer
   
}
?>
2005-06-06 03:57:57
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
this work to fine html streaming AND time pass limit

<?php
header
('Content-type: text/plain');
echo 
date("H:m:s"), "\n";
set_time_limit(30);
for (
$i 0$i 1000$i++)
{

    echo 
date("H:m:s"),"\n";
    for (
$r 0$r 100000$r++){
   
$X.=  tan(M_LNPI+log(ceildate("s")*M_PI*M_LNPI+100)));
    }
   
ob_flush();   
   
flush();

}
echo 
"work! $x";
?>
2005-11-25 00:52:06
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
If you are streaming large data from database, it is counted towards the max exec time.
2006-04-01 09:35:19
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
while setting the set_time_limit(), the duration of sleep() will be ignored in the execution time. The following illustrates:

<?php

set_time_limit
(20);

while (
$i<=10)
{
        echo 
"i=$i ";
       
sleep(100);
       
$i++;
}

?>

Output:
i=0 i=1 i=2 i=3 i=4 i=5 i=6 i=7 i=8 i=9 i=10
2007-01-05 07:50:24
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
To find out the currently set time limit, use

<?php
 ini_get
('max_execution_time');
?>

If set_time_limit has been previously called in the script, the result will be the value which was passed to set_time_limit (and not, as the function name "ini_get" appears to suggest, the value from the php.ini file).
2007-01-12 07:30:53
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
Автор:
In IIS, there is another global timeout setting which will override any PHP settings.  You can alter this timeout by following the following instructions:

http://www.iisadmin.co.uk/?p=7
2008-06-04 15:08:37
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
You can do set_time_limit(0); so that the script will run forever - however this is not recommended and your web server might catch you out with an imposed HTTP timeout (usually around 5 minutes).

You should check your web server's guides for more information about HTTP timeouts.

Jonathon
2008-07-18 17:07:38
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
To get the currently used time, use getrusage()
2008-09-02 07:38:24
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
One thing that I wish I had found sooner is, if you're using php-cli and really need to limit the executation time, and if you're in *nix, you can use "timeout" which is part of coreutils.
For example:

timeout 5 /usr/bin/php -q /path/to/script

and it will kill it if it takes longer than 5 seconds.
I had a few quick php scripts I wrote for use with cacti for example.
2011-11-25 21:39:37
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
Documentation states:
When called, set_time_limit() restarts the timeout counter from zero. In other words, if the timeout is the default 30 seconds, and 25 seconds into script execution a call such as set_time_limit(20) is made, the script will run for a total of 45 seconds before timing out.

If I have a long running script and i want a exact  time limit, I set this as near as possible to the first line.
2014-01-09 22:45:39
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
Both set_time_limit(...) and  ini_set('max_execution_time',...); won't count the time cost of sleep,file_get_contents,shell_exec,mysql_query etc, so i build this function my_background_exec(), to run static method/function in background/detached process and time is out kill it:

my_exec.php:
<?php
function my_background_exec($function_name$params$str_requires$timeout=600)
         {
$map=array('"'=>'\"''$'=>'\$''`'=>'\`''\\'=>'\\\\''!'=>'\!');
         
$str_requires=strtr($str_requires$map);
         
$path_run=dirname($_SERVER['SCRIPT_FILENAME']);
         
$my_target_exec="/usr/bin/php -r \"chdir('{$path_run}');{$str_requires} \\\$params=json_decode(file_get_contents('php://stdin'),true);call_user_func_array('{$function_name}', \\\$params);\"";
         
$my_target_exec=strtr(strtr($my_target_exec$map), $map);
         
$my_background_exec="(/usr/bin/php -r \"chdir('{$path_run}');{$str_requires} my_timeout_exec(\\\"{$my_target_exec}\\\", file_get_contents('php://stdin'), {$timeout});\" <&3 &) 3<&0";//php by default use "sh", and "sh" don't support "<&0"
         
my_timeout_exec($my_background_execjson_encode($params), 2);
         }

function 
my_timeout_exec($cmd$stdin=''$timeout)
         {
$start=time();
         
$stdout='';
         
$stderr='';
         
//file_put_contents('debug.txt', time().':cmd:'.$cmd."\n", FILE_APPEND);
          //file_put_contents('debug.txt', time().':stdin:'.$stdin."\n", FILE_APPEND);

         
$process=proc_open($cmd, [['pipe''r'], ['pipe''w'], ['pipe''w']], $pipes);
          if (!
is_resource($process))
             {return array(
'return'=>'1''stdout'=>$stdout'stderr'=>$stderr);
             }
         
$status=proc_get_status($process);
         
posix_setpgid($status['pid'], $status['pid']);    //seperate pgid(process group id) from parent's pgid

         
stream_set_blocking($pipes[0], 0);
         
stream_set_blocking($pipes[1], 0);
         
stream_set_blocking($pipes[2], 0);
         
fwrite($pipes[0], $stdin);
         
fclose($pipes[0]);

          while (
1)
                {
$stdout.=stream_get_contents($pipes[1]);
                 
$stderr.=stream_get_contents($pipes[2]);

                 if (
time()-$start>$timeout)
                    {
//proc_terminate($process, 9);    //only terminate subprocess, won't terminate sub-subprocess
                     
posix_kill(-$status['pid'], 9);    //sends SIGKILL to all processes inside group(negative means GPID, all subprocesses share the top process group, except nested my_timeout_exec)
                     //file_put_contents('debug.txt', time().":kill group {$status['pid']}\n", FILE_APPEND);
                     
return array('return'=>'1''stdout'=>$stdout'stderr'=>$stderr);
                    }

                 
$status=proc_get_status($process);
                 
//file_put_contents('debug.txt', time().':status:'.var_export($status, true)."\n";
                 
if (!$status['running'])
                    {
fclose($pipes[1]);
                     
fclose($pipes[2]);
                     
proc_close($process);
                     return 
$status['exitcode'];
                    }

                 
usleep(100000); 
                }
         }
?>

a_class.php:
<?php
class A
{
    static function 
jack($a$b)
           {
sleep(4);
           
file_put_contents('debug.txt'time().":A::jack:".$a.' '.$b."\n"FILE_APPEND);
           
sleep(15);
           }
}
?>

test.php:
<?php
require 'my_exec.php';

my_background_exec('A::jack', array('hello''jack'), 'require "my_exec.php";require "a_class.php";'8);
?>
2014-05-20 12:41:53
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
Автор:
set_tme_limit resets the execution time count.

test code1:
<?php
echo '<html><body>';
set_time_limit(1);
$i 0;
while(++
$i 100000001){
        if(
$i 100000 == 0){
                echo 
$i 100000"<br/>\n";
        }
}
echo 
"done.<br/>\n";

// will not echo 'done.'.
?>

test code2:
<?php
echo '<html><body>';
set_time_limit(1);
$i 0;
while(++
$i 100000001){
        if(
$i 100000 == 0){
               
set_time_limit(1);
                echo 
$i 100000"<br/>\n";
        }
}
echo 
"done.<br/>\n";

// will echo 'done.'
?>
2015-07-06 10:54:27
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
Автор:
if you want to check how much time remains, this should work (at least on Windows, on non-Windows platforms, i'm not sure)

$seconds_remaining_until_termination = ini_get('max_execution_time') === "0" ? null : ((int)ini_get('max_execution_time'))-(microtime(true)-$_SERVER['REQUEST_TIME_FLOAT']);

gives you number of seconds until the script will be terminated due to the time limit. (tested on Windows 7 X64 SP1 with PHP 7.3.7)  - or gives you null if there is no time limit.
2019-11-11 09:05:52
http://php5.kiev.ua/manual/ru/function.set-time-limit.html
Автор:
If you would like to calculatue the wall time of your script (includes all external DB/HTTP calls etc.) in Unix (in Windows this is already default behavior), you could use the following function:

<?php

$timeoutInSeconds 
3;

// This will make sure this is always called async                     
pcntl_async_signals(1);   
                                                                                                           
// Second parameter is any callable (https://www.php.net/manual/en/language.types.callable.php)         
pcntl_signal(SIGALRM, function() {
    exit(
'Stop it!');
});
pcntl_alarm($timeoutInSeconds);                                                                                                         
                                                                                 
?>
2021-03-15 14:00:56
http://php5.kiev.ua/manual/ru/function.set-time-limit.html

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