Php Exec功能

Question

I am unable to understand why the return value in php is not working. Can anybody help me?

<?php
exec("xyz.py",$output,$return);
foreach($output as $item){
echo "$item"; 
}
echo $return;
?>

The script of xyz.py is as follows:

def func():
  print ('Hello')
  return 21
func()

The output is always Hello0 no matter what value xyz.py returns

Thanks in advance.

Answer 1

According to the PHP docs, the third argument of exec, ($return in your example), works like this:

If the return_var argument is present along with the output argument, then the return status of the executed command will be written to this variable

Since your python program ran fine, the return status should be 0 (no errors).

This might be what you want:

import sys
def func():
  print ('Hello')
  return 21
sys.exit(func())