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    <p>It does not work the way you outline with your pseudo code. However, the SPL offers a way to iterate multiple iterators at once. It's called <a href="http://php.net/MultipleIterator" rel="nofollow noreferrer"><code>MultipleIterator</code></a> and you can attach as many iterators as you like:</p> <pre><code>$multi = new MultipleIterator(); $multi-&gt;attachIterator(new ArrayIterator($array1)); $multi-&gt;attachIterator(new ArrayIterator($array2)); foreach($multi as $value) { list($key1, $key2) = $multi-&gt;key(); list($value1, $value2) = $value; } </code></pre> <p>See it in action: <a href="http://codepad.viper-7.com/bcOIJ7" rel="nofollow noreferrer">Demo</a></p> <p><strong>Edit:</strong> The first example shows a suggestion from the SPL. It has the benefit that it can deal with any kind of iterators, not only arrays. If you want to express something similar with arrays, you can achieve something similar with the classic <code>while(list()=each())</code> loop, which allows more expressions than <code>foreach</code>.</p> <pre><code>while ( (list($key1, $value1) = each($array1)) &amp;&amp; (list($key2, $value2) = each($array2)) ) { printf("%s =&gt; %s, %s =&gt; %s \n", $key1, $value1, $key2, $value2); } </code></pre> <p><a href="http://codepad.viper-7.com/ouFCZE" rel="nofollow noreferrer">Demo (the minimum number of elements are iterated)</a></p> <hr> <p>See as well a related question: <a href="https://stackoverflow.com/q/4157810/367456">Multiple index variables in PHP foreach loop</a></p>
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    1. COI was not aware of this... interesting.
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    2. COI wish I could give you 10 upvotes
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    3. COWhat if the arrays aren't the same size? Would one key be null while the other has a value?
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