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<?php function special_array() { $x = 42; return [&$x, &$x]; } foreach (special_array() as $x) { var_dump($x); $x++; } foreach (special_array() as &$x) { var_dump($x); $x++; // This _does_ have an effect. }
Output for git.master_jit, git.master
int(42) int(42) int(42) int(43)

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