Cool share, but your program can be written as one line of code...
PHP Code
<?php
for s in map(lambda x: ''.join(__import__('random').sample(x, 20)), ['abcdefghijklmnopqrstuvwxyz'+'ABCDEFGHIJKLMNOPQRSTUVWXYZ'+'0123456789'+'!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'] * 5): print s
