I know how to check if one instance of process is running but how do I check a particular process running with different parameters for example

```
/usr/local/bin/foo --config /home/config1.txt
/usr/local/bin/foo --config /home/config2.txt

```

Following code checks only process name, how do I check if a process is running with a particular parameter?

```
function is_process_running ($process_name) {
    $result = array();
    exec("/sbin/pidof {$process_name}", $result);
    if(is_array($result) && isset($result[0]) && $result[0] >= 1) {
        return true; 
    }
    return false;
}

 is_process_running('/usr/local/bin/foo --config /home/config1.txt') returns true
 is_process_running('/usr/local/bin/foo --config /home/config3.txt') returns false

```