title: PHP: How do you generate all possible combinations of values in an array?
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/1256117/algorithm-that-will-take-numbers-or-words-and-find-all-possible-combinations">algorithm that will take numbers or words and find all possible combinations</a>  </p>
  </blockquote>
  
  
  
  <p>If I have an array such as:</p>
  
  <pre><code>array('a', 'b', 'c', 'd');
  </code></pre>
  
  <p>How would I create a new array with all possible combinations of those 4 values such as</p>
  
  <pre><code>aaaa, aaab, aaac, aaad ... dddb, dddc, dddd
  </code></pre>
  
  <p>Thanks!    </p>