title: Set <select> tag selected value in PHP
body: <p>What would be the best way to set  tag selected value? </p>
  
  <pre><code>&lt;select id="attr_field_10" name="config_eph_payment_type"&gt;
  &lt;option value="5"&gt;First&lt;/option&gt;
  &lt;option value="1"&gt;Second&lt;/option&gt;
  &lt;option value="2"&gt;Third&lt;/option&gt;
  &lt;option value="3"&gt;Fourth&lt;/option&gt;
  &lt;option value="4"&gt;Fifth&lt;/option&gt;
  &lt;option value="7"&gt;Sixth&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>The value comes from <code>$config_eph_payment_type</code> variable (5, 1, 2, 3, 4 or 7). </p>