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<div id="function.mktime" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">mktime</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">mktime</span> &mdash; <span class="dc-title">Restituisce il timestamp Unix per una data</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.mktime-description">
  <h3 class="title">Descrizione</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>mktime</strong></span>(<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$hour</code></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type"><span class="type"><a href="language.types.null.php" class="type null">?</a></span><span class="type"><a href="language.types.integer.php" class="type int">int</a></span></span> <code class="parameter">$minute</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong></span></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type"><span class="type"><a href="language.types.null.php" class="type null">?</a></span><span class="type"><a href="language.types.integer.php" class="type int">int</a></span></span> <code class="parameter">$second</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong></span></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type"><span class="type"><a href="language.types.null.php" class="type null">?</a></span><span class="type"><a href="language.types.integer.php" class="type int">int</a></span></span> <code class="parameter">$month</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong></span></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type"><span class="type"><a href="language.types.null.php" class="type null">?</a></span><span class="type"><a href="language.types.integer.php" class="type int">int</a></span></span> <code class="parameter">$day</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong></span></span>,<br>&nbsp;&nbsp;&nbsp;&nbsp;<span class="methodparam"><span class="type"><span class="type"><a href="language.types.null.php" class="type null">?</a></span><span class="type"><a href="language.types.integer.php" class="type int">int</a></span></span> <code class="parameter">$year</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong></span></span><br>): <span class="type"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span>|<span class="type"><a href="language.types.singleton.php" class="type false">false</a></span></span></div>

  <p class="para rdfs-comment">
   Restituisce il timestamp Unix corrispondente agli argomenti
   forniti. Questo timestamp è un numero intero lungo che contiene il numero di
   secondi trascorsi tra l&#039;Epoca Unix (1 gennaio 1970 00:00:00 GMT) e l&#039;ora
   specificata.
  </p>
  <p class="para">
   Qualsiasi argomento opzionale
   omesso o <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong> verrà impostato al valore corrente in base
   alla data e all&#039;ora locali.
  </p>
  <div class="warning"><strong class="warning">Avviso</strong>
   <p class="para">
    Si noti che l&#039;ordine degli argomenti è insolito:
    <code class="parameter">month</code>, <code class="parameter">day</code>,
    <code class="parameter">year</code>, e non nel più logico ordine di
    <code class="parameter">year</code>, <code class="parameter">month</code>,
    <code class="parameter">day</code>.
   </p>
  </div>
  <p class="simpara">
   Chiamare <span class="function"><strong>mktime()</strong></span> senza argomenti non è supportato,
   e produrrà un <span class="classname"><a href="class.argumentcounterror.php" class="classname">ArgumentCountError</a></span>.
   <span class="function"><a href="function.time.php" class="function">time()</a></span> può essere utilizzata per ottenere il timestamp corrente.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.mktime-parameters">
  <h3 class="title">Elenco dei parametri</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">hour</code></dt>
     <dd>
      <p class="para">
       Il numero dell&#039;ora relativo all&#039;inizio del giorno determinato da
       <code class="parameter">month</code>, <code class="parameter">day</code> e <code class="parameter">year</code>.
       Valori negativi fanno riferimento all&#039;ora precedente la mezzanotte del giorno in questione.
       Valori maggiori di 23 fanno riferimento all&#039;ora appropriata nel/i giorno/i successivo/i.
      </p>
     </dd>
    
    
     <dt><code class="parameter">minute</code></dt>
     <dd>
      <p class="para">
       Il numero dei minuti relativo all&#039;inizio dell&#039;<code class="parameter">hour</code>.
       Valori negativi fanno riferimento ai minuti dell&#039;ora precedente.
       Valori maggiori di 59 fanno riferimento ai minuti appropriati nell&#039;/nelle ora/e successiva/e.
      </p>
     </dd>
    
    
     <dt><code class="parameter">second</code></dt>
     <dd>
      <p class="para">
       Il numero dei secondi relativo all&#039;inizio del <code class="parameter">minute</code>.
       Valori negativi fanno riferimento ai secondi del minuto precedente.
       Valori maggiori di 59 fanno riferimento ai secondi appropriati nel/i minuto/i successivo/i.
      </p>
     </dd>
    
    
     <dt><code class="parameter">month</code></dt>
     <dd>
      <p class="para">
       Il numero del mese relativo alla fine dell&#039;anno precedente.
       I valori da 1 a 12 fanno riferimento ai normali mesi del calendario dell&#039;anno in questione.
       Valori inferiori a 1 (inclusi valori negativi) fanno riferimento ai mesi dell&#039;anno precedente in ordine inverso, quindi 0 è dicembre, -1 è novembre, ecc.
       Valori maggiori di 12 fanno riferimento al mese appropriato nell&#039;/negli anno/i successivo/i.
      </p>
     </dd>
    
    
     <dt><code class="parameter">day</code></dt>
     <dd>
      <p class="para">
       Il numero del giorno relativo alla fine del mese precedente.
       I valori da 1 a 28, 29, 30 o 31 (a seconda del mese) fanno riferimento ai giorni normali nel mese pertinente.
       Valori inferiori a 1 (inclusi valori negativi) fanno riferimento ai giorni del mese precedente, quindi 0 è l&#039;ultimo giorno del mese precedente, -1 è il giorno prima, ecc.
       Valori maggiori del numero di giorni nel mese pertinente fanno riferimento al giorno appropriato nel/i mese/i successivo/i.
      </p>
     </dd>
    
    
     <dt><code class="parameter">year</code></dt>
     <dd>
      <p class="para">
       Il numero dell&#039;anno può essere un valore a due o quattro cifre,
       con valori tra 0-69 mappati su 2000-2069 e 70-100 su
       1970-2000. Nei sistemi in cui time_t è un intero con segno a 32 bit, come
       nella maggior parte dei casi oggi, l&#039;intervallo valido per <code class="parameter">year</code> 
       è compreso tra il 1901 e il 2038.
      </p>
     </dd>
    
   </dl>
  </p>
 </div>
                                                                                                            
   
  
 <div class="refsect1 returnvalues" id="refsect1-function.mktime-returnvalues">
  <h3 class="title">Valori restituiti</h3> 
  <p class="para">
   <span class="function"><strong>mktime()</strong></span> restituisce il timestamp Unix degli argomenti
   forniti, oppure <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> se il timestamp non rientra in un intero PHP.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.mktime-changelog">
  <h3 class="title">Log delle modifiche</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>Versione</th>
       <th>Descrizione</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>8.0.0</td>
       <td>
        <code class="parameter">hour</code> non è più opzionale. Se hai bisogno di un timestamp Unix,
        usa <span class="function"><a href="function.time.php" class="function">time()</a></span>.
       </td>
      </tr>

      <tr>
       <td>8.0.0</td>
       <td>
        <code class="parameter">minute</code>, <code class="parameter">second</code>, <code class="parameter">month</code>,
        <code class="parameter">day</code> e <code class="parameter">year</code> ora possono essere null.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.mktime-examples">
  <h3 class="title">Esempi</h3>
  <p class="para">
   <div class="example" id="example-1">
    <p><strong>Example #1 Esempio di base di <span class="function"><strong>mktime()</strong></span></strong></p>
    <div class="example-contents">
<div class="annotation-interactive phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">// Imposta il fuso orario predefinito da utilizzare.<br /></span><span style="color: #0000BB">date_default_timezone_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'UTC'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Stampa: July 1, 2000 is on a Saturday<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">"July 1, 2000 is on a " </span><span style="color: #007700">. </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"l"</span><span style="color: #007700">, </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">7</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">2000</span><span style="color: #007700">)) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Stampa qualcosa come: 2006-04-05T01:02:03+00:00<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'c'</span><span style="color: #007700">, </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">, </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #0000BB">2006</span><span style="color: #007700">)) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;</span></span></code></div>
    </div>

    <div class="example-contents"><p>Il precedente esempio visualizzerà
qualcosa simile a:</p></div>
    <div class="example-contents screen">
<div class="annotation-interactive examplescode"><pre class="examplescode">July 1, 2000 is on a Saturday
2006-04-05T01:02:03+00:00</pre>
</div>
    </div>
   </div>
  </p>
  <p class="para">
   <div class="example" id="example-2">
    <p><strong>Example #2 Esempio di <span class="function"><strong>mktime()</strong></span></strong></p>
    <div class="example-contents"><p>
     <span class="function"><strong>mktime()</strong></span> è utile per eseguire calcoli e validazioni sulle date
     poiché calcola automaticamente il valore corretto
     per input fuori intervallo. Per esempio, ognuna delle seguenti
     righe produce la stringa &quot;Jan-01-1998&quot;.
    </p></div>
    <div class="example-contents">
<div class="annotation-interactive phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />date_default_timezone_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'America/New_York'</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"c"</span><span style="color: #007700">, </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">12</span><span style="color: #007700">, </span><span style="color: #0000BB">32</span><span style="color: #007700">, </span><span style="color: #0000BB">1997</span><span style="color: #007700">)) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"c"</span><span style="color: #007700">, </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">13</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">1997</span><span style="color: #007700">)) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"c"</span><span style="color: #007700">, </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">1998</span><span style="color: #007700">)) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"c"</span><span style="color: #007700">, </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">98</span><span style="color: #007700">)) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;</span></span></code></div>
    </div>

    <div class="example-contents"><p>Il precedente esempio visualizzerà
qualcosa simile a:</p></div>
    <div class="example-contents screen">
<div class="annotation-interactive examplescode"><pre class="examplescode">1998-01-01T00:00:00-05:00
1998-01-01T00:00:00-05:00
1998-01-01T00:00:00-05:00
1998-01-01T00:00:00-05:00</pre>
</div>
    </div>
   </div>
  </p>
  <p class="para">
   <div class="example" id="example-3">
    <p><strong>Example #3 Uso di mktime per trovare date relative</strong></p>
    <div class="example-contents">
<div class="annotation-interactive phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />date_default_timezone_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'Asia/Tokyo'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$tomorrow  </span><span style="color: #007700">= </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"m"</span><span style="color: #007700">)  , </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"d"</span><span style="color: #007700">)+</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"Y"</span><span style="color: #007700">));<br />print </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'c'</span><span style="color: #007700">, </span><span style="color: #0000BB">$tomorrow</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$lastmonth </span><span style="color: #007700">= </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"m"</span><span style="color: #007700">)-</span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"d"</span><span style="color: #007700">),   </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"Y"</span><span style="color: #007700">));<br />print </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'c'</span><span style="color: #007700">, </span><span style="color: #0000BB">$lastmonth</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$nextyear  </span><span style="color: #007700">= </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"m"</span><span style="color: #007700">),   </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"d"</span><span style="color: #007700">),   </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">"Y"</span><span style="color: #007700">)+</span><span style="color: #0000BB">1</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />print </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'c'</span><span style="color: #007700">, </span><span style="color: #0000BB">$nextyear</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;</span></span></code></div>
    </div>

    <div class="example-contents"><p>Il precedente esempio visualizzerà
qualcosa simile a:</p></div>
    <div class="example-contents screen">
<div class="annotation-interactive examplescode"><pre class="examplescode">2025-09-30T00:00:00+09:00
2025-08-29T00:00:00+09:00
2026-09-29T00:00:00+09:00</pre>
</div>
    </div>
   </div>
   <blockquote class="note"><p><strong class="note">Nota</strong>: 
    <p class="para">
     Questo può essere più affidabile rispetto ad aggiungere o sottrarre semplicemente il numero
     di secondi in un giorno o in un mese a un timestamp a causa dell&#039;ora
     legale.
    </p>
   </p></blockquote>
  </p>
  <p class="para">
   <div class="example" id="example-4">
    <p><strong>Example #4 Ultimo giorno di un mese</strong></p>
    <div class="example-contents"><p>
     L&#039;ultimo giorno di un determinato mese può essere espresso come il giorno &quot;0&quot;
     del mese successivo, non come il giorno -1. Entrambi i seguenti esempi
     produrranno la stringa &quot;The last day in Feb 2000 is: 29&quot;.
    </p></div>
    <div class="example-contents">
<div class="annotation-interactive phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /><br />$lastday </span><span style="color: #007700">= </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">2000</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">'Last day in Feb 2000 is: '</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'d'</span><span style="color: #007700">, </span><span style="color: #0000BB">$lastday</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$lastday </span><span style="color: #007700">= </span><span style="color: #0000BB">mktime</span><span style="color: #007700">(</span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">, -</span><span style="color: #0000BB">31</span><span style="color: #007700">, </span><span style="color: #0000BB">2000</span><span style="color: #007700">);<br />echo </span><span style="color: #DD0000">'Last day in Feb 2000 is: '</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'d'</span><span style="color: #007700">, </span><span style="color: #0000BB">$lastday</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;</span></span></code></div>
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    <div class="example-contents"><p>Il precedente esempio visualizzerà:</p></div>
    <div class="example-contents screen">
<div class="annotation-interactive examplescode"><pre class="examplescode">Last day in Feb 2000 is: 29
Last day in Feb 2000 is: 29</pre>
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    </div>
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 </div>


 <div class="refsect1 seealso" id="refsect1-function.mktime-seealso">
  <h3 class="title">Vedere anche:</h3>
  <p class="para">
   <ul class="simplelist">
    <li>La classe <span class="classname"><a href="class.datetimeimmutable.php" class="classname">DateTimeImmutable</a></span></li>
    <li><span class="function"><a href="function.checkdate.php" class="function" rel="rdfs-seeAlso">checkdate()</a> - Valida una data gregoriana</span></li>
    <li><span class="function"><a href="function.gmmktime.php" class="function" rel="rdfs-seeAlso">gmmktime()</a> - Riceve l'UNIX timestamp per una data GMT</span></li>
    <li><span class="function"><a href="function.date.php" class="function" rel="rdfs-seeAlso">date()</a> - Formatta un timestamp Unix</span></li> 
    <li><span class="function"><a href="function.time.php" class="function" rel="rdfs-seeAlso">time()</a> - Restituisce l'attuale UNIX timestamp</span></li>
   </ul>
  </p>
 </div>

</div><?php manual_footer($setup); ?>