Execute at command from php page with command line input

Question

I want to execute the below command from PHP shell_script in Linux environment.

shell_exec('at 12:39 <<< "mkdir newfolder"');

I have tried in all the method of PHP to execute this script but it is not working. In terminal when I am running at 12:39 <<< "mkdir newfolder" it is executing and the task is scheduling.But when I am trying the same script to run in php by using shell_exec it is not working.

You can understand the issues when you type at 12:39 it will show you to put the input and press Ctrl+d to complete execution. to make this in a single line here I am using <<<

Can anyone suggest how can I execute this script from the PHP?

Answer 1

shell_exec uses dash shell system by default : to make sure run php -r 'echo shell_exec("echo $0");' and it will output 'sh' , and Dash does not have the <<< redirection operator.

Instead you could force the use of Bash and do something like:

shell_exec('/bin/bash -c \'at 12:39 <<< "mkdir newfolder"\'');

Hope this will help.