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<div id="function.variant-add" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">variant_add</h1>
  <p class="verinfo">(PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">variant_add</span> &mdash; <span class="dc-title">&quot;Adds&quot; two variant values together and returns the result</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.variant-add-description">
  <h3 class="title">Descrizione</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>variant_add</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.mixed.php" class="type mixed">mixed</a></span> <code class="parameter">$left</code></span>, <span class="methodparam"><span class="type"><a href="language.types.mixed.php" class="type mixed">mixed</a></span> <code class="parameter">$right</code></span>): <span class="type"><a href="class.variant.php" class="type variant">variant</a></span></div>

  <p class="para rdfs-comment">
   Adds <code class="parameter">left</code> to <code class="parameter">right</code> using
   the following rules (taken from the MSDN library), which correspond to
   those of Visual Basic:
   <table class="doctable table">
    <caption><strong>Variant Addition Rules</strong></caption>
    
    <thead>
     <tr>
      <th>If</th>
      <th>Then</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>Both expressions are of the string type</td>
      <td>Concatenation</td>
     </tr>

     <tr>
      <td>One expression is a string type and the other a
      character</td>
      <td>Addition</td>
     </tr>

     <tr>
      <td>One expression is numeric and the other is a string</td>
      <td>Addition</td>
     </tr>

     <tr>
      <td>Both expressions are numeric</td>
      <td>Addition</td>
     </tr>

     <tr>
      <td>Either expression is NULL</td>
      <td>NULL is returned</td>
     </tr>

     <tr>
      <td>Both expressions are empty</td>
      <td>Integer subtype is returned</td>
     </tr>

    </tbody>
   
  </table>

 </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.variant-add-parameters">
  <h3 class="title">Elenco dei parametri</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">left</code></dt>
     <dd>
      <p class="para">
       The left operand.
      </p>
     </dd>
    
    
     <dt><code class="parameter">right</code></dt>
     <dd>
      <p class="para">
       The right operand.
      </p>
     </dd>
    
   </dl>
   <blockquote class="note"><p><strong class="note">Nota</strong>: 
<p class="para">
 Come con tutte le funzioni aritmetiche variant, i parametri per questa funzione
 possono essere sia tipi nativi di PHP (integer, string, floating point, boolean o
 <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong>), oppure una istanza di una classe COM, VARIANT o DOTNET.  I tipi nativi PHP
 saranno convertiti in variant usando le stesse regole trovate nel costruttore
 per la classe <a href="class.variant.php" class="xref">variant</a>.  Degli oggetti COM e DOTNET
 verrà preso il valore della loro proprietà di default ed utilizzato come il valore del variant.
</p>
<p class="para">
 Le funzioni aritmetiche variant sono dei wrapper attorno alle funzioni col nome simile
 nella libreria COM; per ulteriori informazioni su queste funzioni, consultare
 la libreria MSDN.  Le funzioni PHP hanno nome leggermente differente: per esempio
 variant_add() in PHP corrisponde a  VarAdd() nella documentazione MSDN.
</p>
</p></blockquote>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-function.variant-add-returnvalues">
  <h3 class="title">Valori restituiti</h3>
  <p class="para">
   Returns the result.
  </p>
 </div>


 <div class="refsect1 errors" id="refsect1-function.variant-add-errors">
  <h3 class="title">Errori/Eccezioni</h3>
  <p class="para">
   Throws a <span class="classname"><a href="class.com-exception.php" class="classname">com_exception</a></span> on failure.
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.variant-add-seealso">
  <h3 class="title">Vedere anche:</h3>
  <p class="para">
   <ul class="simplelist">
    <li><span class="function"><a href="function.variant-sub.php" class="function" rel="rdfs-seeAlso">variant_sub()</a> - Subtracts the value of the right variant from the left variant value</span></li>
   </ul>
  </p>
 </div>

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