set cron use php

file_put_contents('crontab.txt','* * * * * php /var/www/html/autopostwpp/twitter/twitter-api-php-master/index.php'.PHP_EOL);
echo exec('crontab crontab.txt');
$output = exec('crontab -l');
echo $output;
$myFile = "crontab.txt";
//unlink($myFile);


ref:
http://w3schools.invisionzone.com/index.php?showtopic=45340

98down voteaccepted

crontab command usage usage: crontab [-u user] file crontab [-u user] [ -e | -l | -r ] (default operation is replace, per 1003.2) -e (edit user's crontab) -l (list user's crontab) -r (delete user's crontab) -i (prompt before deleting user's crontab) So, $output = shell_exec('crontab -l'); file_put_contents('/tmp/crontab.txt', $output.'* * * * * NEW_CRON'.PHP_EOL); echo exec('crontab /tmp/crontab.txt'); The above can be used for both create and edit/append provided the user has the adequate file write permission. To delete jobs: echo exec('crontab -r'); Also, take note that apache is running as a particular user and that's usually not root, which means the cron jobs can only be changed for the apache user unless given crontab -u privilege to the apache user.