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<?php function retVal() { global $foo; return $foo; } function & retRef() { global $foo; return $foo; } $foo = 'init'; $bar = retRef(); $bar = 'bar'; var_dump($foo, $bar);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(4) "init" string(3) "bar"