executing python program from cmd and php

Question

exec("cd /d c:\xampp\htdocs\youtube");
exec("python main.py > c:\xampp\htdocs\youtube\out.txt");

I have written code in php so that it takes a python program and executes and it saves the result in out.txt but it is not working I did the same thing from cmd it is working where am i going wrong

• u_mulder: Doing cd doesn't mean that next exec will be called from target directory.

Answer 1

You should use either

exec("python c:\xampp\htdocs\youtube\main.py > c:\xampp\htdocs\youtube\out.txt");

or

exec("cd /d c:\xampp\htdocs\youtube && python main.py > c:\xampp\htdocs\youtube\out.txt");

Because cd will not retain its directory over multiple exec() statements.

• suniponna kumar: i have replaced it but the output of main.py is not saving into the output.txt .how to save the output of .py into txt file using cmd from php

Answer 2

You may try:

exec("cd /d c:\xampp\htdocs\youtube && python main.py > c:\xampp\htdocs\youtube\out.txt");

• suniponna kumar: i have replaced it but output of main.py is not writting in to output.txt
• Reto: Try exec("cd /d c:\xampp\htdocs\youtube && python -V > c:\xampp\htdocs\youtube\out.txt"); If this writes the python version into your file, then your main.py file doesn't output anything. Else your OS doesn't find python when called from php
• suniponna kumar: print("hiiiii ponna") this is main.py this is php <?php $code=$_POST["code"]; $filename_code="main1.py"; $out="output.txt"; $file_code=fopen($filename_code,"w+"); fwrite($file_code,$code); fclose($file_code); //exec("chmod 777 $out"); //$out=fopen("output.txt","w+"); exec("cd /d c:\xampp\htdocs\youtube && python -V > c:\xampp\htdocs\youtube\out.txt"); echo file_get_contents("output.txt"); fclose($out); ?> where iam going wrong i have writtten a html by post and it submits from that i am trying to exec the python please help
• Reto: You are trying to write to a file "out.txt" and then you are trying to read the content of "output.txt"
• suniponna kumar: yes but the writng is not happing into out.txt plz helpme