title: Exact match with awk
body: <p>I am trying to extract the <code>extension_dir</code> using a bash script.It works under most cases but sometimes you can get a 2 line output</p>
  
  <p><code>php -i | awk -F '=&gt; ' '/extension_dir/'</code></p>
  
  <pre><code>extension_dir =&gt; /usr/lib64/php/modules =&gt; /usr/lib64/php/modules
  sqlite3.extension_dir =&gt; no value =&gt; no value
  </code></pre>
  
  <p>I want to match <code>extension_dir</code> exactly so that the result is always <code>/usr/lib64/php/modules</code></p>
  
  <p>I want only <code>/usr/lib64/php/modules</code> as output</p>