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+--- Thread: taking down the system (/showthread.php?tid=71538)
taking down the system - richb201 - 08-25-2018
I have a cron job that I will run every Sat night.
One of the first things it does is:
$_SERVER['MAINT']=1;
This creates a $_Server variable and sets it to one. At the end of the cron job I use:
$_SERVER['MAINT']=0;
echo('done with cron_job');
exit(0);
This correctly sets the MAINT to zero and exits.
But when a user brings up my main application, in the index() I have:
if ($_SERVER['MAINT']==1) {
show_error("The Substantiator is down for weekly maintanance. ",500,"System down");
exit(0);
}
This is not working. When I stop with the debugger on the line above and look for $_Server['MAINT']==1, it doesn't exist. This causes a real error instead of the fake one I am trying to create.
I thought the $_SERVER variable is global on the Apache. What am I doing wrong?
Rich
RE: taking down the system - ragingTorch - 08-25-2018
I haven't played with setting variables in _SERVER global in this manner nor have I seen it in the wild.
You could go with a lock file solution to track when the cron starts and ends for your other files
Along the lines of
PHP Code:
file_put_contents('cron.lock', time());
//do your cron things here
unlink('cron.lock');
In your index, you can do
PHP Code:
if(file_exists('cron.lock'))
{
show_error("The Substantiator is down for weekly maintanance. ",500,"System down");
exit(0);
}
RE: taking down the system - richb201 - 08-26-2018
Thanks. Where does cron.lock go? I can't seem to find it. Is it hidden?
RE: taking down the system - ragingTorch - 08-26-2018
(08-26-2018, 06:06 AM)richb201 Wrote: Thanks. Where does cron.lock go? I can't seem to find it. Is it hidden?cron.lock is a temp file that will be created by the file_put_contents function and it will be removed once the cron script has finished running.
RE: taking down the system - richb201 - 08-26-2018
ok. got it. thx