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POHow do I alter array keys and values while using a RecursiveArrayIterator?
 

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  1. POHow do I alter array keys and values while using a RecursiveArrayIterator?
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    <p>I suspect I'm doing something stupid here, but I'm confused by what seems like a simple problem with SPL:</p> <p>How do I modified the contents of an array (the values in this example), using a <a href="http://php.net/RecursiveArrayIterator" rel="noreferrer">RecursiveArrayIterator</a> / <a href="http://php.net/RecursiveIteratorIterator" rel="noreferrer">RecursiveIteratorIterator</a>?</p> <p>Using the follow test code, I can alter the value within the loop using <a href="http://php.net/iteratoriterator.getinneriterator" rel="noreferrer">getInnerIterator()</a> and <a href="http://php.net/ArrayAccess.offsetSet" rel="noreferrer">offsetSet()</a>, and dump out the modified array while I'm within the loop.</p> <p>But when I leave the loop and dump the array from the iterator, it's back to the original values. What's happening?</p> <pre><code>$aNestedArray = array(); $aNestedArray[101] = range(100, 1000, 100); $aNestedArray[201] = range(300, 25, -25); $aNestedArray[301] = range(500, 0, -50); $cArray = new ArrayObject($aNestedArray); $cRecursiveIter = new RecursiveIteratorIterator(new RecursiveArrayIterator($cArray), RecursiveIteratorIterator::LEAVES_ONLY); // Zero any array elements under 200 while ($cRecursiveIter-&gt;valid()) { if ($cRecursiveIter-&gt;current() &lt; 200) { $cInnerIter = $cRecursiveIter-&gt;getInnerIterator(); // $cInnerIter is a RecursiveArrayIterator $cInnerIter-&gt;offsetSet($cInnerIter-&gt;key(), 0); } // This returns the modified array as expected, with elements progressively being zeroed print_r($cRecursiveIter-&gt;getArrayCopy()); $cRecursiveIter-&gt;next(); } $aNestedArray = $cRecursiveIter-&gt;getArrayCopy(); // But this returns the original array. Eh?? print_r($aNestedArray); </code></pre>
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    1. COLooks like this is a bug you should file on http://bugs.php.net/
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