How to declare a variable that can not insert in function : <p>I wanna declare a function with 2 Input parameters.</p>

<pre><code>function myFunc( $first , $second )
    {
       return $first;
    }
</code></pre>

<p>When it called I only need the first parameter and don't wanna use "NULL" for the second.</p>

<pre><code>echo myFunc("Hello"); 
</code></pre>

<p>Sorry because of my poor English</p>

<p>Thanks</p>
