<?php
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    2 => 'Verifica si una clave DBA existe',
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?>
<div id="function.dba-exists" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">dba_exists</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">dba_exists</span> &mdash; <span class="dc-title">Verifica si una clave DBA existe</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.dba-exists-description">
  <h3 class="title">Descripción</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>dba_exists</strong></span>(<span class="methodparam"><span class="type"><span class="type"><a href="language.types.string.php" class="type string">string</a></span>|<span class="type"><a href="language.types.array.php" class="type array">array</a></span></span> <code class="parameter">$key</code></span>, <span class="methodparam"><span class="type"><a href="class.dba-connection.php" class="type Dba\Connection">Dba\Connection</a></span> <code class="parameter">$dba</code></span>): <span class="type"><a href="language.types.boolean.php" class="type bool">bool</a></span></div>

  <p class="simpara">
   <span class="function"><strong>dba_exists()</strong></span> verifica si la
   <code class="parameter">key</code> especificada existe en la base de datos.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.dba-exists-parameters">
  <h3 class="title">Parámetros</h3>
  <dl>
   
    <dt><code class="parameter">key</code></dt>
    <dd>
     <span class="simpara">
      La clave a verificar.
     </span>
    </dd>
   
   
    <dt><code class="parameter">dba</code></dt>
    <dd>
     <span class="simpara">
      Una instancia de <span class="classname"><a href="class.dba-connection.php" class="classname">Dba\Connection</a></span>, devuelta por <span class="function"><a href="function.dba-open.php" class="function">dba_open()</a></span> o <span class="function"><a href="function.dba-popen.php" class="function">dba_popen()</a></span>.
     </span>
    </dd>
   
  </dl>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.dba-exists-returnvalues">
  <h3 class="title">Valores devueltos</h3>
  <p class="simpara">
   Retorna <strong><code><a href="reserved.constants.php#constant.true">true</a></code></strong> si la clave existe, <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> en caso contrario.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.dba-exists-changelog">
  <h3 class="title">Historial de cambios</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>Versión</th>
      <th>Descripción</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
 <td>8.4.0</td>
 <td>
  El parámetro <code class="parameter">dba</code> ahora espera una instancia de <span class="classname"><a href="class.dba-connection.php" class="classname">Dba\Connection</a></span>;
  anteriormente, se esperaba un <span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span> <code class="literal">dba</code> válido.
 </td>
</tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 seealso" id="refsect1-function.dba-exists-seealso">
  <h3 class="title">Ver también</h3>
  <ul class="simplelist">
   <li><span class="function"><a href="function.dba-delete.php" class="function" rel="rdfs-seeAlso">dba_delete()</a> - Elimina una l&iacute;nea en una base DBA</span></li>
   <li><span class="function"><a href="function.dba-fetch.php" class="function" rel="rdfs-seeAlso">dba_fetch()</a> - Lee los datos asociados a una clave DBA</span></li>
   <li><span class="function"><a href="function.dba-insert.php" class="function" rel="rdfs-seeAlso">dba_insert()</a> - Inserta una entrada DBA</span></li>
   <li><span class="function"><a href="function.dba-replace.php" class="function" rel="rdfs-seeAlso">dba_replace()</a> - Reemplaza o inserta una l&iacute;nea DBA</span></li>
  </ul>
 </div>

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