For monitoring purposes, I want to forward the amount of open files of the current process to our monitoring tool. In shell, the following command can be executed to get the desired information: ls /proc/PROCES_ID/fd | wc -l where PROCES_ID is the current process id. Is there a way to get this information natively in PHP?
To run any shell commands from within php script and get the output:
From PHP manual on exec() command
exec(string $command, array &$output = null, int &$result_code = null): string|false
For your command:
$output = []; // this array will hold whatever the output from the bash command
$result_code = null; // this will give you the result code returned, if needed
$command = '/proc/PROCES_ID/fd | wc -l'; // command to be run in the bash
exec($command, $output, $result_code);
//now you can look into $output array variable for the values returned from the above command
print_r($output);
But as mentioned in the comment, using bash script over php should be preferred if feasible.