title: apache not starting after adding php extension
body: <p>UGH - 
  windows server 2003
  apache 2.2 (httpd-2.2.22-win32-x86-openssl-0.9.8t)
  PHP 5.2 (php-5.2.17-Win32-VC6-x86)</p>
  
  <p>Everything has been humming along fine for months - I recently implemented a mPDF implementation...(locally developed on laptop)
  when I uploaded it to my server - I got an error saying I needed PHP_MBSTRING</p>
  
  <p>So I relaunched my installer on my server - and added this extension...
  apache would not restart.</p>
  
  <p>If I comment out THESE line from my http.conf - then it starts...</p>
  
  <pre><code>PHPIniDir "C:/PHP/"
  LoadModule php5_module "C:/PHP/php5apache2_2.dll"
  </code></pre>
  
  <p>yes - php5apache2_2.dll DOES exist - and is in this directory...
  I tried commenting out this extension PHP_MBSTRING and even removing it from the EXT folder...</p>
  
  <p>I have tried fully uninstalling and reinstalling...
  I have troed upgrading to PHP 5.3 (which required installing C++ redist)
  and PHP 5.4 - although neither of these helped. </p>
  
  <p>WTFlip!! Im at a loss - </p>
  
  <p>ERROR LOG LIKE LIKE THIS:</p>
  
  <pre><code>Syntax error on line 520 of C:/Program Files/Apache Software Foundation/Apache2.2/conf/httpd.conf:
  Invalid command 'PHPIniDir', perhaps misspelled or defined by a module not included in the server configuration
  [Tue Feb 26 23:33:19 2013] [notice] Child 1492: Released the start mutex
  [Tue Feb 26 23:33:20 2013] [notice] Child 1492: All worker threads have exited.
  [Tue Feb 26 23:33:20 2013] [notice] Child 1492: Child process is exiting
  </code></pre>