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<?php function &gen_reference() { $data = [77,78,79]; foreach($data as $value ) { yield $value; } } $it = gen_reference(); foreach ($it as &$number) { echo $number *= -1,"\n"; } // Must unset $number ... $it = gen_reference(); foreach($it as $number){ echo $number; }
Output for git.master, git.master_jit, rfc.property-hooks
-77 -78 -79 777879

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