In our centos6 server. I would like to execute a php script in cron job as apache user but unfortunately it does not work.
here is the edition of crontab (crontab -uapache -e)
24 17 * * * php /opt/test.php
and here is the source code of "test.php" file which works fine with "apache" user as owner.
<?php exec( 'touch /opt/test/test.txt');?>
I try to replace php with full path of php (/usr/local/php/bin/php) but also it doesn't work
Thanks in advance, Please Help me
Could be that although you have 755/777 permissions, SELinux is blocking httpd from writing/creating dirs.
Try:
chcon -R -t httpd_sys_content_t /path/to/www
chcon -R -t httpd_sys_content_rw_t /path/to/www/dir/for/rw
Further info: http://wiki.centos.org/TipsAndTricks/SelinuxBooleans
test.php:
<?php
print_r($argv);
?>
Shell:
$ php -q test.php foo bar
Array
(
[0] => test.php
[1] => foo
[2] => bar
)
As said before, CLI scripts by default have no time limit.
But I would also like to mention an alternative to your cron job approach:
You can fork a CLI PHP script from a PHP script under webserver control. I have done this many times. It is especially useful if you have a script with long execution time which must be triggered by some website user action (e.g. building a very large archive file and send a download link by email when the file is complete).
I usually fork a CLI script from a webserver PHP script using the popen() function. This allows to nicely transfer parameters to the new script instance like this:
$bgproc = popen('php "/my/path/my-bckgrnd-proc.php"', 'w');
if($bgproc===false){
die('Could not open bgrnd process');
}else{
// send params through stdin pipe to bgrnd process:
$p1 = serialize($param1);
$p2 = serialize($param2);
$p3 = serialize($param3);
fwrite($bgproc, $p1 . "n" . $p2 . "n" . $p3 . "n");
pclose($bgproc);
}
In the CLI script you would receive these params like this...
$fp = fopen('php://stdin', 'r');
$param1 = unserialize(fgets($fp));
$param2 = unserialize(fgets($fp));
$param3 = unserialize(fgets($fp));
fclose($fp);
...and do anything with them that would take to long under webserver control.
This technique works equally well in *nix and Windows environments.
To elaborate on Sougata Bose's answer, I think the OP wants a command to be run every 10 seconds from a start time; not 10 seconds after the first minute and every subsequent minute.
cron only has a resolution of 1 minute (there are other tools I think that may have finer resolutions but they are not standard on unix).
Therefore, to resolve your issue you need 60 seconds / 10 seconds = 6 cron jobs, each with a sleep.
e.g. run crontab -e and add the following lines to your chosen editor:
* * * * * ( /usr/bin/wget http://api.us/application/ )
* * * * * ( sleep 10 ; /usr/bin/wget http://api.us/application/ )
* * * * * ( sleep 20 ; /usr/bin/wget http://api.us/application/ )
* * * * * ( sleep 30 ; /usr/bin/wget http://api.us/application/ )
* * * * * ( sleep 40 ; /usr/bin/wget http://api.us/application/ )
* * * * * ( sleep 50 ; /usr/bin/wget http://api.us/application/ )
Automated Tasks: Cron
Cron is a time-based scheduling service in Linux / Unix-like computer operating systems. Cron job are used to schedule commands to be executed periodically. You can setup commands or scripts, which will repeatedly run at a set time. Cron is one of the most useful tool in Linux or UNIX like operating systems. The cron service (daemon) runs in the background and constantly checks the /etc/crontab file, /etc/cron./* directories. It also checks the /var/spool/cron/ directory.
Configuring Cron Tasks
In the following example, the crontab command shown below will activate the cron tasks automatically every ten minutes:
In the above sample, the */10 * * * * represents when the task should happen. The first figure represents minutes – in this case, on every "ten" minute. The other figures represent, respectively, hour, day, month and day of the week.
*is a wildcard, meaning "every time".Start with finding out your PHP binary by typing in command line:
The output should be something like:
Specify correctly the full path in your command.
Type the following command to enter cronjob:
To see what you got in crontab.
EDIT 1:
To exit from vim editor without saving just click:
And then type
q!