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<?php function add_four(&$bar){ $bar += 4; return $bar; } $foo = 1; $too = add_four($foo); $foo; print $foo.'-'.$to;
Output for 5.5.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: to in /in/qtsfG on line 10 5-
Output for 4.3.0 - 5.4.45
5-