PHP sleep（）函数在一段时间后查杀脚本

Question

I am experiencing a problem when using sleep() function in php for a long period of time, if i test the following code all runs perfectly:

<?php

set_time_limit(0);

$i = 0;

while($i < 10) {

    echo $i.'<br />';

    if($i == 5){        
        echo 'sleeping 5 secs<br />';
        sleep(5);   
        echo 'waking up<br />';
    }

    $i++;
}

?>

*****OUTPUT****

0
1
2
3
4
5
sleeping 5 secs
waking up
6
7
8
9

*****OUTPUT****

It sleeps 5 seconds and after that the "waking up" is echoed without problems, but, if I raise the amount of seconds the script is sleeping to lets say 15 minutes the output is the following:

*****OUTPUT****

0
1
2
3
4
5
sleeping 900 secs //(15 mins)

*****OUTPUT****

The script appears to be killed after 15 minutes of sleeping!!, what could be causing this? note that I set the max_execution_time flag to infinite with set_time_limit(0); at the top of the script.

I will appreciate any help, thanks!

Answer 1

Even the webserver (Apache, IIS, ...) has a timeout setting, try to check your many has 300sec as default).

Moreover be carefull about set_time_limit. From the manual: 'This function has no effect when PHP is running in safe mode. There is no workaround other than turning off safe mode or changing the time limit in the php.ini.'