title: Where are php's extensions .so files located?
body: <p>I opened some some ini files like <strong>mysqli.ini</strong> , <strong>mysql.ini</strong> ,  <strong>pdo_mysql.ini</strong>. Inside those files there is an .so extension added for those files. I want to know where these <strong>.so</strong> files are stored.</p>
  
  <p>Inside mysqli.ini file</p>
  
  <pre><code>; configuration for php MySQL module
  ; priority=20
  extension=mysqli.so
  </code></pre>
  
  <p>Inside mysql.ini file</p>
  
  <pre><code>; configuration for php MySQL module
  ; priority=20
  extension=mysql.so
  </code></pre>
  
  <p>Inside pdo_mysql.ini file</p>
  
  <pre><code>; configuration for php MySQL module
  ; priority=20
  extension=pdo_mysql.so
  </code></pre>