title: After I've downgraded my wamp PHP version to 5.2.11, how can I get Apache to start?
body: <p>I'm trying to run a PHP application full of depracted <code>ereg</code> calls.  I got the wampserver extension to switch from PHP 5.3.10 to 5.2.11, where that function is still valid, but when I try to start my services Apache won't start.  I'm using Apache 2.2.11, PHP 5.2.11, and MySQL 5.5.20 on Windows 7 x64.  The <code>index.php</code> page I'm trying to load comes up when I use PHP 5.3.10, albeit with a lot of errors about my <code>ereg</code> functions.</p>
  
  <p>I get that I can go through all my PHP files and update the code to modern usage, but shouldn't I be able to use wampserver's PHP version extensions, since they're offered?</p>
  
  <p>I've tried copying .dll's from <code>/wamp/bin/php/php5.2.11/</code> directly into <code>/wamp/bin/</code> but it looks like the installer for the 5.2.11 extension had taken care of that already.  It also seems to have updated <code>php.ini</code> during install.</p>
  
  <p>The Apache error log shows zero activity when I try to start wamp services.  Not even notices.</p>
  
  <p>I'm pretty new to Apache and PHP so I'm not sure what relevant info I could paste from <code>php.ini</code> or <code>httpd.conf</code> but if there's anything in either of those that you think would be helpful to work toward a solution, let me know and I'll paste it.</p>