Sets whether a client disconnect should cause a script to be aborted.
When running PHP as a command line script, and the script's tty goes
away without the script being terminated then the script will die the
next time it tries to write anything, unless
enable is set to true
If set and not null, this function will set the ignore_user_abort ini setting
to the given enable. Otherwise, this function will
only return the previous setting without changing it.
<?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. ?>
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().
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);
?>
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:
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.