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Comment from Anonymous is not 100% valid. Time from sleep function is not counted to execution time because sleep delays program execution (see http://www.php.net/manual/en/function.sleep.php and comments). We tested it and it's true. Try this:
<?php
set_time_limit(2);
sleep(4);
echo 'hi!';
sleep(4);
echo 'bye bye!';
?>
It means, that if the loop most of the time will be at sleep (and in this case it probably be), then this script may be active for months or years even if you set time limit to one day.
ignore_user_abort
(PHP 4, PHP 5)
ignore_user_abort — Set whether a client disconnect should abort script execution
설명
int ignore_user_abort
([ string $value
] )
Sets whether a client disconnect should cause a script to be aborted.
인수
- value
-
If set, this function will set the ignore_user_abort ini setting to the given value . If not, this function will only return the previous setting without changing it.
반환값
Returns the previous setting, as an integer.
예제
Example #1 A ignore_user_abort() example
<?php
// Ignore user aborts and allow the script
// to run forever
ignore_user_abort(true);
set_time_limit(0);
echo 'Testing connection handling in PHP';
// Run a pointless loop that sometime
// hopefully will make us click away from
// page or click the "Stop" button.
while(1)
{
// Did the connection fail?
if(connection_status() != CONNECTION_NORMAL)
{
break;
}
// Sleep for 10 seconds
sleep(10);
}
// If this is reached, then the 'break'
// was triggered from inside the while loop
// So here we can log, or perform any other tasks
// we need without actually being dependent on the
// browser.
?>
주의
PHP will not detect that the user has aborted the connection until an attempt is made to send information to the client. Simply using an echo statement does not guarantee that information is sent, see flush().
참고
- connection_aborted() - Check whether client disconnected
- connection_status() - Returns connection status bitfield
- Connection Handling for a complete description of connection handling in PHP.
add a note
User Contributed Notesignore_user_abort
lukas dot starecek at centrum dot cz
14-Sep-2009 07:22
14-Sep-2009 07:22
Anonymous
03-Jul-2009 08:38
03-Jul-2009 08:38
use the spiritual-coder's code below with exreme caution and do not use it unless you are an advanced user.
first of all, such a code with no bypass point can cause infinite loops and ghost threads in server. there must be a trick to break out the loop.
i.e. you can use if (file_exists(dirname(__FILE__)."stop.txt")) break; in the loop so if you create "stop.txt", she script will stop execution.
also if you use set_time_limit(86400); instead of set_time_limit(0); your script will stop after one day.
phpguy92135 at yahoo dot com
08-Jun-2009 11:28
08-Jun-2009 11:28
Theres no point in sending anything to the browser if the user does abort. Since the user aborted, the browser wont listen even if PHP did send information to the browser.
If you want to see if the user did abort, then use error_log() or some other form of logging to find out what happened, but dont rely on the output to the browser as the only method of checking ones data.
spiritual-coder at spiritual-coder dot com
13-Jul-2006 04:45
13-Jul-2006 04:45
If you want to simulate a crontask you must call this script once and it will keep running forever (during server uptime) in the background while "doing something" every specified seconds (= $interval):
<?php
ignore_user_abort(1); // run script in background
set_time_limit(0); // run script forever
$interval=60*15; // do every 15 minutes...
do{
// add the script that has to be ran every 15 minutes here
// ...
sleep($interval); // wait 15 minutes
}while(true);
?>
plamen at pulsator dot com
29-Mar-2001 05:21
29-Mar-2001 05:21
The script should output something to the browser in order to abort. If there is no output the script keeps on running.