Only count article from directory from file
<p>I'm trying to count the amount of articles that are in a large file - example-</p>

<pre><code>103.239.234.105 -- [2007-04-01 00:42:21] "GET articles/learn_PHP_basics HTTP/1.0" 200 12729 "Mozilla/4.0"
207.3.35.52 -- [2007-04-01 01:24:42] "GET index.php HTTP/1.0" 200 11411 "Mozilla/4.0"
51.4.190.113 -- [2007-04-01 02:07:04] "GET articles/php_classes_and_oop HTTP/1.0" 200 7674 "MSIE 7.0"
</code></pre>

<p>They ideas where i start?</p>
