How to change text alt of image?
<pre><code>View source you will see:

&lt;img src="/download/22462-6/Audi_R8_V10_5_2_FSI_quattro_01.jpg" width="700" height="525" alt="Audi R8 V10 5.2 FSI quattro"/&gt;
</code></pre>

<p>I want to change to:</p>

<pre><code>&lt;img src="/download/22462-6/Audi_R8_V10_5_2_FSI_quattro_01.jpg" width="700" height="525" alt="Audi R8 V10 5.2 FSI quattro Pictures"/&gt;
</code></pre>

<blockquote>
  <p>And function save($filename, $alt) </p>
  
  <p>How to change alt when alt null ? I can this ideas ?</p>
</blockquote>
