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?>
<div id="language.namespaces.nested" class="sect1">
  <h2 class="title">Declaring sub-namespaces</h2>
  
  <p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7, PHP 8)</p>
  <p class="para">
   Much like directories and files, PHP namespaces also contain the ability to specify
   a hierarchy of namespace names. Thus, a namespace name can be defined with
   sub-levels:
   <div class="example" id="example-341">
    <p><strong>Example #1 Declaring a single namespace with hierarchy</strong></p>
    <div class="example-contents">
     <div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">namespace </span><span style="color: #0000BB">MyProject\Sub\Level</span><span style="color: #007700">;<br /><br />const </span><span style="color: #0000BB">CONNECT_OK </span><span style="color: #007700">= </span><span style="color: #0000BB">1</span><span style="color: #007700">;<br />class </span><span style="color: #0000BB">Connection </span><span style="color: #007700">{ </span><span style="color: #FF8000">/* ... */ </span><span style="color: #007700">}<br />function </span><span style="color: #0000BB">connect</span><span style="color: #007700">() { </span><span style="color: #FF8000">/* ... */  </span><span style="color: #007700">}<br /><br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
    </div>

   </div>
   The above example creates constant <code class="literal">MyProject\Sub\Level\CONNECT_OK</code>,
   class <code class="literal">MyProject\Sub\Level\Connection</code> and function
   <code class="literal">MyProject\Sub\Level\connect</code>.
  </p>
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