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<?php $iterator = new ArrayIterator([1, 2, 3]); $iteratorbis = new ArrayIterator([4, 5, 6]); $callable = function (Iterator $it) { var_dump($it->current()); echo $it->current() * 5, PHP_EOL; return true; }; iterator_apply($iterator, $callable, [$iterator]); echo "===", PHP_EOL; iterator_apply($iterator, $callable, [$iteratorbis]); echo "===", PHP_EOL; iterator_apply($iteratorbis, $callable, [$iterator]);
Output for git.master, git.master_jit, rfc.property-hooks
int(1) 5 int(2) 10 int(3) 15 === int(4) 20 int(4) 20 int(4) 20 === NULL 0 NULL 0 NULL 0

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