Im new to this.I have a cron file called xml.php and i want to run this file at a particular interval.This interval is set by admin on admin panel page.This interval will be stored in the database and i want to fetch that data from db.According to that the xml.php should run.If anybody know how to do this please help.Thanks in advance
Create a script that checks the DB for the last run of the file and the current time difference. If the interval is correct then run the xml script if not then exit. Use cron to run the new script every minute (so every minute it will check if the script needs to be run and run it only if it's time).
What you will need to do is save it as you wish in DB... but there is no way to dynamically change a crontab... What you can do tho is at point of saving to DB you can use PHP to manipulate the crontab using the details that are saved/to be saved you can construct an appropriate crontab entry - see this for more details: Use PHP to create, edit and delete crontab jobs?
It will also depend on the hosting company on their permissions if they will let you execute shell commands from within PHP.
Related
have a php page called cronEmail in the web folder. It incudes the code to end an email to specific users on the website. I want it to open the page once a day and send the email. The page has only php and MySql code to read the recipients of the email.
I am trying to use Task scheduler in the control panel to run the page. I create a user defined script and in schedule I set the time to a certain time and to only run daily once a day.
In the rum command i have tried numerous ways to run it on the time but every time it just passes and does nothing. an example of what I put in for the script is
/web/cronEmail.php OR
chmod 755 /volume1/web/cronEmail.php
There are only two of a many can anyone point me in the right direction
Thanks a million
Seems like you want a cronjob, in the terminal open cron with:
crontab -e
then at the bottom of the file place this
0 4 * * * php /url/to/folder/cronEmail.php
Not sure if you found another solution, but this is what worked for me. If you put the following in the "Run Command" section, it should work:
php /volume1/web/cronEmail.php
You can also create an error log by doing the following:
php /volume1/web/cronEmail.php>> /volume1/web/errors.log 2>&1
If you don't use the php at the beginning, and open up the error.log file that is created, what you'll see is that the Task Scheduler doesn't seem to know that it's looking for PHP, and doesn't recognize the script.
I want every day to check my database and do some staff with it. Cronjob is amazing solution. But how to make authentification? Otherwise anyone can trigger that code at any time. Thank you.
For example usually person must insert login and password, get token and store it in cookies. After that you have rights to change anything. How to make it in cronjob.
add cron job in is such way so that php file run from CLI.Don't run it by sending http request.Command for running as CLI will be like php test.php
and add the following code in the php file so that it is only allowed to run from CLI:
if (php_sapi_name() == "cli") die('run only from CLI');
I wanted to implement two cronjobs with different execution time. One cron job is for sending emails and second cron job for validating my application subscriptions.
I write one crontab file and write to two cronjob as follows:
2 * * * * path to mailCronjob mail.php
20 * * * * path to check my application's subscriptions sub.php
The problem is first cronjob is working fine. Mail will delivers fine, but the second cronjob
is not working. I tried to run second job manually, its also working fine.
I am using command to set cronjob as:
crontab crontab_file
when I give command crontab -l
it also shows both cronjob in command line.
I wanted to ask, am I missing something here, or what should I do to run those cronjobs.
FACT: you can run as many cron jobs from a single crontab file as you wish.
FACT: you can also run different jobs as different users, each with their own crontab file.
SUGGESTION:
1) Just debug what's wrong with your second job.
2) It could be path, it could be permissions; it's more than likely environment (the environment for "cron" can be different from the environment for the same user from a command line).
PS:
Try this, too:
How to simulate the environment cron executes a script with?
Debugging crontab jobs
Check the owning user's email and see if an error report has been sent to it.
If you need to be a certain user and have that user's environment change your call to
su - -c "/path/to/sub.php" SubScriptUser
If your script only works from a certain directory use
cd /path/to/ && ./sub.php
I recall the same problem. For some reason, I had to press enter after my second cron job. Even in the first cron job, if it is the only job, needs a CR/LF (enter). Cursor needs to be on second line (if there is one cron job)... cursor needs to be on the third line, if there is two cron jobs. I guess, needs to read the file completely to interpret the cron job command. I just share this, because if you dont do that, only the first job will be executed, and skips the second one totally unless enter is pressed at the end of the second job. Best regards and cheers... Test that and let us know.
You need to add an empty line to the end of the config file
I never did 2 actuall cronjobs in one cron-tab file, but rather had the one cronjob execute every 15 minutes and query the database or look into a config file what tasks are there to execute, maybe this concept helps you.
I have two php files. In one php file there is simple html form in which I created some drop down for select time and days for cronjob when user set time and day and submit form then all the drop down values stored in database.
Now with the help of this stored values I need to set cronjob and when cron will execute then it run another php file in which I write some code for generate xml file.
And this file run every time which time is stored by user in database.
By using Cpanel I can do that but I don't want to use cpanel.
Please give me some proper and working solution, I really need it.
Thanks in advance.
Use phps system() or exec() function to call the crontab command to replace or modify the existing crontab for the account the web server runs under. You might have to make sure that user is allowed to use the cron system, this depends on the operating system you use.
From within the crontab you can use one of two strategies to run a php script_
- call the php cli interpreter like any normal command, so something like: /usr/bin/php and give it the script to interpret. As an alternative you also can use shebang inside your php script and call it as a simple executable.
- use wget to call an url pointing to your webserver (maybe localhost) when you want to execute the script inside your web server.
This might act as a starting point for you to experiment with:
#!/usr/bin/php
<?php
// the time tokens to be fed into the crontab line
$time=array('10','*','*','*','*');
// the actual command to be executed
$command=sprintf("crontab -l | (cat;echo \"%s\t%s\") | crontab",
implode(' ',$time),
'/usr/bin/beep');
// execute command
$result=system($command);
// output result of execution
if ($result)
echo "Result: $result\n";
else
echo "FAILURE!\n";
?>
Works for me when called from CLI.
I am trying to add a cronjob in the kloxo based user interface,
So i navigate into cron scheduled tasks -> add standard -> Select x minutes, select 'all' in all other fields (hour, day, week, month, ..), then add the path in the last field: /home/piscolab/public_html/keepyourlinks.com/includes/boot.php
But the file is never executed,
what am i missing?
find the problem: check the cron log. if you dont know where your cron log is going to check the syslog. if you cant find anything there kill the cron proccess and start a new one with the -L /yourlogpath/ parameter specified. wait till the job is supposed to run and check the log after.
fix your problem or come back here to get help
as i see you dont specify what program should run the *.php file. change that to whatever program you want to run the php file.
if you use linux and the gui/webgui sux, fall back to shell. cron jobs are defined within /etc/spool/crond/crontab/root (or something similar to that, cant remember the exact path right now, but using TABSTOP will do the job for you). the crontab syntax can be seen here and here. Cron newbies go here as well.