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POCan you explain this odd behaviour with repeated values after looping with a reference?
 

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  1. POCan you explain this odd behaviour with repeated values after looping with a reference?
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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/8220399/strange-behaviour-after-loop-by-reference-is-this-a-php-bug">Strange behaviour after loop by reference - Is this a PHP bug?</a> </p> </blockquote> <h3><a href="http://ideone.com/zTv2i" rel="nofollow noreferrer">ideone</a></h3> <h3>code:</h3> <pre><code>&lt;?php $arr = array(array(1),array(2),array(3)); foreach($arr as &amp;$i) { print_r($i); } foreach($arr as $i) { print_r($i); } </code></pre> <h3>output</h3> <pre><code>Array ( [0] =&gt; 1 ) Array ( [0] =&gt; 2 ) Array ( [0] =&gt; 3 ) Array ( [0] =&gt; 1 ) Array ( [0] =&gt; 2 ) Array ( [0] =&gt; 2 ) </code></pre> <p>I know I just need to put an <code>unset($i)</code> after the first loop to fix it, but I can't really figure out what would cause the <code>2</code> to be repeated. It always seems to be the last value that is overwritten with the 2nd to last value. It doesn't seem to happen when the array items are primitives ('scalar' in PHP).</p> <p>I've ran into this problem a few times with reused variables when someone forgets to unset a reference. Really confused me the first time.</p> <h1>Duplicates</h1> <ul> <li><a href="https://stackoverflow.com/questions/4969243/strange-behavior-of-foreach">Strange behavior Of foreach</a></li> <li><a href="https://stackoverflow.com/questions/8901861/understanding-foreach-logic-with-references-why-is-the-1st-element-being-chang">Understanding foreach logic with references - Why is the 1st element being changed to &#39;two&#39;, the 2nd to &#39;three&#39;, and the third to &#39;three3&#39;?</a></li> <li><a href="https://stackoverflow.com/questions/8220399/strange-behaviour-after-loop-by-reference-is-this-a-php-bug">PHP Foreach Pass by Reference: Last Element Duplicating? (Bug?)</a></li> </ul>
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      1. POCan you explain this odd behaviour with repeated values after looping with a reference?
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    1. COI answered almost exactly this question with a very detailed explanation just yesterday... http://stackoverflow.com/questions/8901861/understanding-foreach-logic-with-references-why-is-the-1st-element-being-chang/8901999#8901999
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    2. CO@MarkBaker: Your answer here was more clear: http://stackoverflow.com/a/4969286/65387 Thanks.
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    3. COHopefully, between the two sets of answers you'll have the answer to your question
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      1. POCan you explain this odd behaviour with repeated values after looping with a reference?
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