title: bash is replacing colon with space, how do I keep the colons?
body: <p>I am trying to echo a compatible MySQL datetime wit bash and it keeps replacing the colons with spaces.</p>
  
  <p>Any ideas on how I can prevent them from being replaced?</p>
  
  <p>Also, I have tried to replace the spaces with sed back into colons, but they still come out as spaces, what is the deal here?</p>
  
  <pre><code>#!/bin/bash
  now=$(date +"%Y-%m-%d %H:%M:%S") 
  EXECUTED=$(php evaluate.php $now)
  </code></pre>
  
  <p>Exepected Result: 2012-12-08 06:34:00</p>
  
  <p>evaluate.php</p>
  
  <pre><code>var_dump($argv)
  </code></pre>