gistfile1.py

def addOne(x):
  return x+1
  
# prints 5
print addOne(4)

# also prints 5
print addOne(addOne(3))

gistfile2.php

<?php
funtion addOne($x)
{
  return $x+1;
}

// prints 5
print addOne(4);

// also prints 5
print addOne(addOne(3));