How to create cron job using PHP?

Solution:

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.
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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
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Solution:

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";
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Then, add an entry to the crontab:

* * * * * /usr/bin/php -f /usr/local/bin/run.php &> /dev/null
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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
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and then, add the following entry into crontab:

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

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]
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You could read some more about this here.

Solution:

Type the following in the linux/ubuntu terminal

 crontab -e 
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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
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Solution:

Better use the project Cron in combination with the Linux cronjob for this task. It allows you to configure run times in your PHP Code, support background jobs and is easy to use.

First step call a PHP Script every minute:

* * * * * /usr/local/bin/run.php &> /dev/null
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Second Step use the cron/cron Package to configure run times directly in PHP.

$deprecatedStatus = new ShellJob();
$deprecatedStatus->setCommand('cd /app && /usr/local/bin/php cron/updateDeprecatedStatus.php');
$deprecatedStatus->setSchedule(new CrontabSchedule('* * * * */2'));


$displayDate = new ShellJob();
$displayDate->setCommand('cd /app && /usr/local/bin/php cron/updateDisplayDate.php');
$displayDate->setSchedule(new CrontabSchedule('* * * * */5'));
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You found the details how to use in the linked repository.

Solution:

That may depend on your web host if you are not hosting your own content. If your web host supports creating chron jobs, they may have a form for you to fill out that lets you select the frequency and input the absolute path to the file to execute. For instance, my web host (DreamHost) allows me to create custom cron jobs by typing in the absolute path to the file and selecting the frequency from a select menu. This may not be possible for your server, in which case you need to either edit the crontab directly or through your host specific method.

As Alister Bulman details above, create a PHP file to run using CLI (making sure to include#!/usr/bin/env php at the very start of the file before the<?php tag. This ensures that the shell knows which executable should be invoked when running the script.

Solution:

First open your SSH server with username and password and change to the default root user(User with all permissions) then follow the steps below,

1. enter the commandcrontab -l now you will see the list of all cronjobs.
2. entercrontab -e a file with all cron jobs will be opened.
3. Edit the file with your cronjob schedule asmin hr dayofmonth month dayofweek pathtocronjobfile and save the file.
4. Now you will see a responsecrontab: installing new crontab now again check the list of cronjobs your cron job will be listed there.

Solution:

There is a simple way to solve this: you can execute php file by cron every 1 minute, and inside php executable file make "if" statement to execute when time "now" like this

<?/** suppose we have 1 hour and 1 minute inteval 01:01 */

$interval_source = "01:01";
$time_now = strtotime( "now" ) / 60;
$interval = substr($interval_source,0,2) * 60 + substr($interval_source,3,2);


if( $time_now % $interval == 0){
/** do cronjob */
}
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Solution:

$command = "php ".CRON_PATH.php ";
if(substr(php_uname(), 0, 7) == "Windows"){
pclose(popen("start /B ". $command, "r"));
}else{
shell_exec($command ." > /dev/null &");
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*       *       *       *       *       /usr/bin/php path/to/cron.php &> /dev/null
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function _cron_exe($schedules) {
        if ($obj->get_option('cronenabledisable') == "yes") {
            // $interval = 1*20;
            $interval = $obj->get_option('cronhowtime');
            if ($obj->get_option('crontiming') == 'minutes') {
                $interval = $interval * 60;
            } else if ($obj->get_option('crontiming') == 'hours') {
                $interval = $interval * 3600;
            } else if ($obj->get_option('crontiming') == 'days') {
                $interval = $interval * 86400;
            }
            $schedules['hourlys'] = array(
                'interval' => $interval,
                'display' => 'cronjob'
            );
            return $schedules;
        }

}
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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);
}
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