How to create cron job using PHP?

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I'm new to using cron job. I don't even know how to write it. I have tried to search from internet, but I still don't understand it well. I want to create a cron job that will execute my code every minute. I'm using PHP to create it. It is not working.

Example

run.php (Code that will be executed every minute)

<?php

echo "This code will run every minute";

?>

cron.php

<?php

$path = dirname(__FILE__);
$cron = $path . "/run.php";
echo exec("***** php -q ".$cron." &> /dev/null");

?>

Suppose that these two files are in the same folder.

Is the code that I did wrong? If wrong, please kindly tell me how to fix it.

This is the best explanation with code in PHP I have found so far:

http://code.tutsplus.com/tutorials/managing-cron-jobs-with-php--net-19428

In short:

Although the syntax of scheduling a new job may seem daunting at first glance, it's actually relatively simple to understand once you break it down. A cron job will always have five columns each of which represent a chronological 'operator' followed by the full path and command to execute:

* * * * * home/path/to/command/the_command.sh

Each of the chronological columns has a specific relevance to the schedule of the task. They are as follows:

Minutes represents the minutes of a given hour, 0-59 respectively.
Hours represents the hours of a given day, 0-23 respectively.
Days represents the days of a given month, 1-31 respectively.
Months represents the months of a given year, 1-12 respectively.
Day of the Week represents the day of the week, Sunday through Saturday, numerically, as 0-6 respectively.

So, for example, if one wanted to schedule a task for 12am on the first day of every month it would look something like this:

0 0 1 * * home/path/to/command/the_command.sh

If we wanted to schedule a task to run every Saturday at 8:30am we'd write it as follows:

30 8 * * 6 home/path/to/command/the_command.sh

There are also a number of operators which can be used to customize the schedule even further:

Commas is used to create a comma separated list of values for any of the cron columns.
Dashes is used to specify a range of values.
Asterisksis used to specify 'all' or 'every' value

Visit the link for the full article, it explains:

  1. What is the format of the cronjob if you want to enter/edit it manually.
  2. How to use PHP with SSH2 library to authenticate as the user, which crontab you are going to edit.
  3. Full PHP class with all necessary methods for authentication, editing and deleting crontab entries.

How to set the cron job to run a PHP script in cPanel , A configuration file called 'Crontab' lies in the schedule. All the timers and tasks info lies there. Build, Deploy & Manage Web Apps on Your  Questions: I’m new to using cron job. I don’t even know how to write it. I have tried to search from internet, but I still don’t understand it well. I want to create a cron job that will execute my code every minute. I’m using PHP to create it. It is not working. Example run.php

In the same way you are trying to run cron.php, you can run another PHP script. You will have to do so via the CLI interface though.

#!/usr/bin/env php
<?php
# This file would be say, '/usr/local/bin/run.php'
// code
echo "this was run from CRON";

Then, add an entry to the crontab:

* * * * * /usr/bin/php -f /usr/local/bin/run.php &> /dev/null

If the run.php script had executable permissions, it could be listed directly in the crontab, without the /usr/bin/php part as well. The 'env php' part, in the script, would find the appropriate program to actually run the PHP code. So, for the 'executable' version - add executable permission to the file:

chmod +x /usr/local/bin/run.php

and then, add the following entry into crontab:

* * * * * /usr/local/bin/run.php &> /dev/null

How to Schedule Cron Jobs in PHP, Learn how to run PHP scripts from cron jobs with this detailed guide featuring relevant code snippets and helpful tips to make the process as painless as possible. You can run the script directly by using the PHP command-line interpreter. A common method for running PHP scripts from a cron job is to use a command-line program such as curl or wget. For example, the cron job runs a command similar to the following command: In this command, curl retrieves the web page, which then runs the PHP script.

Added to Alister, you can edit the crontab usually (not always the case) by entering crontab -e in a ssh session on the server.

The stars represent (* means every of this unit):

[Minute] [Hour] [Day] [Month] [Day of week (0 =sunday to 6 =saturday)] [Command]

You could read some more about this here.

How to run PHP scripts from cron jobs, Core php code download : https://drive.google.com/file/d/​1QDucYdMUgQUjQuraWsjMxxdvcq Duration: 13:50 Posted: Oct 20, 2017 This will open the cron tab for you on your server. Next thing is you have to do a cron entry for the file which you want to execute. 00 00 * * * /usr/local/bin/php "path of the php file which you want to execute" 00 00 * * * this will run your cron at midnight daily, means at 0hrs and 0mins

Type the following in the linux/ubuntu terminal

 crontab -e 

select an editor (sometime it asks for the editor) and this to run for every minute

*       *       *       *       *       /usr/bin/php path/to/cron.php &> /dev/null

how to create cron job in core php, In this tutorial, we'll create a dynamic PHP class that, using a secure connection, provides us with a means to manipulate the cronTab! All I would like to do is run a PHP script at a specific time. The user first inputs a time in a script, according to the time specified the server will run the script. I am using windows 7 and xampp. What I have found is: Create a php file that calls the cron.php file: Using notepad (or whatever),

why you not use curl? logically, if you execute php file, you will execute that by url on your browser. its very simple if you run curl

while(true)
{
    sleep(60); // sleep for 60 sec = 1 minute

    $s = curl_init();
    curl_setopt($s,CURLOPT_URL, $your_php_url_to_cron); 
    curl_exec($s); 
    curl_getinfo($s,CURLINFO_HTTP_CODE); 
    curl_close($s);
}

Managing Cron Jobs With PHP, Creating a cron job. Create the cron.yaml file in the root directory of your application (alongside app.yaml ). Add  That’s not all. Cron uses 3 operator symbols which allow you to specify multiple values in a field: Asterisk (*): specifies all possible values for a field. The comma (,): specifies a list of values. Dash (-): specifies a range of values. Separator (/): specifies a step value.

Scheduling Tasks With Cron for PHP, This article shows how to manually create a custom cron job using your For example let's say you have a PHP file named script.php in your  Manually creating a custom cron job. Log into your server via SSH using the Shell user you wish to create the cron job under. Once logged in, run the following command to open your crontab file. [server]$ crontab -e no crontab for example_username - using an empty one You are then asked to

Creating a custom Cron Job – DreamHost Knowledge Base, Using Cron, a developer can automate such tasks as mailing ezines that might Now, let's try to set up the automated running of mailstock.php. We set thee intervals from within four directories that sort the jobs into hourly,  Step 7 - Removing Existing Cron Jobs. Now that we can create new cron jobs, it's only logical that we have the ability to remove them as well! The remove_cronjob() method will take one argument which will be a (simple) regular expression. This regEx will be used to find matching jobs within the cronTab and remove them accordingly.

Introducing Cron, This article will explain how to run php and other file types using Cron jobs. article will provide examples of different commands you can use in Cron Job. Creating a cron job. Create the cron.yaml file in the root directory of your application (alongside app.yaml). Add one or more <cron> entries to your file and define the necessary elements for your

Comments
  • do you have shell access on the server?
  • You can't just echo out *** and expect a cronjob to be created. Read up here how to create cronjobs (assuming you are on a server running linux) thesitewizard.com/general/set-cron-job.shtml
  • @Dagon: i don't know about this. I'll check it out.
  • It is a one off event so use crontab
  • This would work in theory but the php-script would have to run all the time which is not a good thing.
  • You have to set php-max-execution-time to be 0 in order to run this forever. Also if some error occurs in your script, it wont execute again until you restart it manually.
  • As much as I'm much interested in your codes, can you explain?
  • I think we are looking solutions to create cronjob using php and not using any terminal or cpanel. I also want to find this solutions using php only.
  • This will only work if you load the page, basically this is not a solution!
  • What if I close the browser ? This fails !