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?>
<div id="function.pg-lo-read" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">pg_lo_read</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.2.0, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">pg_lo_read</span> &mdash; <span class="dc-title">
   Lit un objet de grande taille
  </span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.pg-lo-read-description">
  <h3 class="title">Description</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>pg_lo_read</strong></span>(<span class="methodparam"><span class="type"><a href="class.pgsql-lob.php" class="type PgSql\Lob">PgSql\Lob</a></span> <code class="parameter">$lob</code></span>, <span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$length</code><span class="initializer"> = 8192</span></span>): <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.singleton.php" class="type false">false</a></span></span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>pg_lo_read()</strong></span> lit au plus <code class="parameter">length</code>
   octets d&#039;un objet de grande taille, et retourne les données sous la forme
   d&#039;une chaîne.
  </p>
  <p class="para">
   Pour utiliser un objet de grande taille (<code class="literal">lo</code>), il est 
   nécessaire de le faire dans une transaction.
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    Auparavant, cette fonction s&#039;appelait <span class="function"><strong>pg_loread()</strong></span>.
   </p>
  </p></blockquote>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.pg-lo-read-parameters">
  <h3 class="title">Liste de paramètres</h3>
  <p class="para">
   <dl>
    
     <dt><code class="parameter">lob</code></dt>
     <dd>
      <p class="para">Une instance <span class="classname"><a href="class.pgsql-lob.php" class="classname">PgSql\Lob</a></span>, retourné par <span class="function"><a href="function.pg-lo-open.php" class="function">pg_lo_open()</a></span>.</p>
     </dd>
    
    
     <dt><code class="parameter">length</code></dt>
     <dd>
      <p class="para">
       Un nombre maximal d&#039;octets à retourner. Cet argument est optionnel.
      </p>
     </dd>
    
   </dl>
  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.pg-lo-read-returnvalues">
  <h3 class="title">Valeurs de retour</h3>
  <p class="para">
   Une chaîne contenant <code class="parameter">length</code> octets de l&#039;objet de grande
   taille ou <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong> en cas d&#039;erreur.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.pg-lo-read-changelog">
  <h3 class="title">Historique</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>Version</th>
      <th>Description</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
 <td>8.1.0</td>
 <td>
  Le paramètre <code class="parameter">lob</code> attend désormais une instance de
  <span class="classname"><a href="class.pgsql-lob.php" class="classname">PgSql\Lob</a></span> ; auparavant, une <span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span> était attendu.
 </td>
</tr>

    </tbody>
   
  </table>

 </div>

 
 <div class="refsect1 examples" id="refsect1-function.pg-lo-read-examples">
  <h3 class="title">Exemples</h3>
  <p class="para">
   <div class="example" id="example-1">
    <p><strong>Exemple #1 Exemple avec <span class="function"><strong>pg_lo_read()</strong></span></strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br />   $doc_oid </span><span style="color: #007700">= </span><span style="color: #0000BB">189762345</span><span style="color: #007700">;<br />   </span><span style="color: #0000BB">$database </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=jacarta"</span><span style="color: #007700">);<br />   </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #DD0000">"begin"</span><span style="color: #007700">);<br />   </span><span style="color: #0000BB">$handle </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_lo_open</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #0000BB">$doc_oid</span><span style="color: #007700">, </span><span style="color: #DD0000">"r"</span><span style="color: #007700">);<br />   </span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_lo_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$handle</span><span style="color: #007700">, </span><span style="color: #0000BB">50000</span><span style="color: #007700">);<br />   </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$database</span><span style="color: #007700">, </span><span style="color: #DD0000">"commit"</span><span style="color: #007700">);<br />   echo </span><span style="color: #0000BB">$data</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>
    </div>

   </div> 
  </p>
 </div>

 
 <div class="refsect1 seealso" id="refsect1-function.pg-lo-read-seealso">
  <h3 class="title">Voir aussi</h3>
  <p class="para">
   <ul class="simplelist">
    <li><span class="function"><a href="function.pg-lo-read-all.php" class="function" rel="rdfs-seeAlso">pg_lo_read_all()</a> - Lit un objet de grande taille en totalit&eacute;</span></li>
   </ul>
  </p>
 </div>

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