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<?php $array = new ArrayObject(array(1, 2)); $it = $array->getIterator(); $array[] = 3; while ($it->valid()) { $it->next(); echo $it->offsetGet(-1); } $it = $prev; $it->next(); echo $it->valid() ? $it->current() : "not valid";
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key -1 in /in/u4CPA on line 13 Warning: Undefined array key -1 in /in/u4CPA on line 13 Warning: Undefined array key -1 in /in/u4CPA on line 13 Warning: Undefined variable $prev in /in/u4CPA on line 16 Fatal error: Uncaught Error: Call to a member function next() on null in /in/u4CPA:17 Stack trace: #0 {main} thrown in /in/u4CPA on line 17
Process exited with code 255.

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