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118 lines
3.8 KiB
XML
118 lines
3.8 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: 4bf27edcd6c317ea311e68117bb2fa20dacb8e57 Maintainer: PhilDaiguille Status: ready -->
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<!-- Reviewed: yes -->
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<refentry xml:id="pdo-pgsql.lobopen" xmlns="http://docbook.org/ns/docbook" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refnamediv>
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<refname>Pdo\Pgsql::lobOpen</refname>
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<refpurpose>Abre un flujo sobre un objeto grande existente</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis role="Pdo\\Pgsql">
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<modifier>public</modifier> <type class="union"><type>resource</type><type>false</type></type><methodname>Pdo\Pgsql::lobOpen</methodname>
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<methodparam><type>string</type><parameter>oid</parameter></methodparam>
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<methodparam choice="opt"><type>string</type><parameter>mode</parameter><initializer>"rb"</initializer></methodparam>
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</methodsynopsis>
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<simpara>
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<methodname>Pdo\Pgsql::lobOpen</methodname> abre un flujo para acceder
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a los datos referenciados por <parameter>oid</parameter>.
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Todas las funciones habituales del sistema de ficheros, tales como <function>fread</function>,
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<function>fwrite</function> o <function>fgets</function> pueden ser utilizadas
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para manipular el contenido del flujo.
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</simpara>
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<xi:include xpointer="xmlns(db=http://docbook.org/ns/docbook) xpointer(id('pdo-pgsql.lobcreate')/db:refsect1[@role='description']/db:note/.)">
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<xi:fallback/>
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</xi:include>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<variablelist>
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<varlistentry>
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<term><parameter>oid</parameter></term>
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<listitem>
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<simpara>
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Un identificador de objeto grande.
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</simpara>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>mode</parameter></term>
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<listitem>
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<simpara>
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Si el modo es <literal>r</literal>, abre el flujo en lectura.
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Si el modo es <literal>w</literal>, abre el flujo en escritura.
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</simpara>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<simpara>
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Devuelve un recurso de flujo en caso de éxito,&return.falseforfailure;
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</simpara>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<example xml:id="pdo-pgsql.lobopen.example.basic">
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<title>Ejemplo de <methodname>Pdo\Pgsql::lobOpen</methodname></title>
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<simpara>
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Según el ejemplo de <methodname>Pdo\Pgsql::lobCreate</methodname>,
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este código extrae el objeto grande
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de la base de datos y lo devuelve al navegador.
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</simpara>
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<programlisting role="php">
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<![CDATA[
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<?php
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$db = new Pdo\Pgsql('pgsql:dbname=test host=localhost', $user, $pass);
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$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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$db->beginTransaction();
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$stmt = $db->prepare("SELECT oid FROM BLOBS WHERE ident = ?");
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$stmt->execute(array($some_id));
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$stmt->bindColumn('oid', $oid, PDO::PARAM_STR);
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$stmt->fetch(PDO::FETCH_BOUND);
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$stream = $db->pgsqlLOBOpen($oid, 'r');
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header("Content-type: application/octet-stream");
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fpassthru($stream);
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?>
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]]>
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</programlisting>
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</example>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<simplelist>
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<member><methodname>Pdo\Pgsql::lobCreate</methodname></member>
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<member><methodname>Pdo\Pgsql::lobUnlink</methodname></member>
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<member><function>pg_lo_create</function></member>
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<member><function>pg_lo_open</function></member>
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</simplelist>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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