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<?php function foo(&$array) { foreach ($array as $value) { var_dump($value); $array[1] = 'c'; } } $arr = array('a', 'b'); foo($arr);
Output for hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
string(1) "a" string(1) "b"
Output for 4.3.0 - 5.6.26
string(1) "a" string(1) "c"