php_switch.asp

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actions based on one of several different conditions.</p>
<hr />

<h2>The Switch Statement</h2>
<p>If you want to select one of many blocks 
of code to be executed, use the Switch statement.</p>
<p>The switch statement is used to avoid long blocks of if..elseif..else code.</p>
<h3>Syntax</h3>
<table class="ex" cellspacing="0" width="100%" border="1" id="table11">
  <tr>
    <td>
    <pre>switch (<i>expression</i>)
{
case <i>label1:</i>
  <i>code to be executed if expression = label1;</i>
  break;  
case <i>label2:</i>
  <i>code to be executed if expression = label2;</i>
  break;
default:
  <i>code to be executed
  if expression is different 
  from both label1 and label2;</i>
}</pre>
    </td>
  </tr>
</table>

<h3>Example</h3>
<p>This is how it works:</p>
<ul>
	<li>A single expression (most often a 
variable) is evaluated once</li>
	<li>The value of the expression is compared with the values for each case in 
	the structure</li>
	<li>If there is a match, the code associated with that case is executed</li>
	<li>After a code is executed, <b>break </b>is used to stop the code from 
	running into the next case</li>
	<li>The default statement is used if none of the cases are true</li>
</ul>
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    <td>
    <pre>&lt;html&gt;
&lt;body&gt;</pre>
    <pre>&lt;?php
switch ($x)
{
case 1:
  echo &quot;Number 1&quot;;
  break;
case 2:
  echo &quot;Number 2&quot;;
  break;
case 3:
  echo &quot;Number 3&quot;;
  break;
default:
  echo &quot;No number between 1 and 3&quot;;
}
?&gt;</pre>
    <pre>&lt;/body&gt;
&lt;/html&gt;</pre>
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