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From Crimson Gibbon, 9 Years ago, written in PHP.
This paste is a reply to Untitled from Reliable Finch - view diff
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  1. $var = 0;
  2. function add (&$param) {
  3.     return ++$var;
  4. }
  5. $var1 = add($var);
  6. //var = 1;, var1 = 1