Running a program using shell_exec in PHP, how to know if process is done?

Question

Hi I am running a python script inside PHP using the shell_exec command, However how would I know if the execution of the python has been completed already?

Here is portion of my code

$py_path = 'app/public/engines/validation/delta';        
chdir($py_path);                    
$py_var = 'python scraped_data.py';                   
$exec = shell_exec($py_var);

How would I know if the python is finished its processing? I wanted to know because I have a series of processes to run but it needs the first process to be completed first.

Thank You,

Jovan Djordjevic · Accepted Answer · 2021-01-06 10:55:44Z

1

If you check php.net description of shell_exec() is:

shell_exec — Execute command via shell and return the complete output as a string

So you can edit your python script to output true or 1 once script is finished.

then you can simply code something like this:

$py_path = 'app/public/engines/validation/delta';        
chdir($py_path);                    
$py_var = 'python scraped_data.py';                   
$exec = shell_exec($py_var);
If($exec){
//Execute another script or do what you wish
}

answered Jan 6, 2021 at 10:55

Jovan Djordjevic

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1 Comment

apelidoko Over a year ago

Can you help me on why my shell_exec does not work for my python command, stackoverflow.com/questions/65612905/… Thank You

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