mirror of
https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@283831 c90b9560-bf6c-de11-be94-00142212c4b1
125 lines
3.6 KiB
XML
125 lines
3.6 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision$ -->
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<!-- Generated by xml_proto.php v2.3. Found in /scripts directory of phpdoc. -->
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<refentry xml:id="function.pdo-pgsqllobopen" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>PDO::pgsqlLOBOpen</refname>
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<refpurpose>Opens an existing large object stream</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>resource</type><methodname>PDO::pgsqlLOBOpen</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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<para>
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<function>PDO::pgsqlLOBOpen</function> opens a stream to access the data
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referenced by <parameter>oid</parameter>. If <parameter>mode</parameter>
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is <literal>r</literal>, the stream is opened for reading, if
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<parameter>mode</parameter> is <literal>w</literal>, then the stream will
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be opened for writing. You can use all the usual filesystem functions,
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such as <function>fread</function>, <function>fwrite</function> and
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<function>fgets</function> to manipulate the contents of the stream.
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</para>
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<note>
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<simpara>
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This function, and all manipulations of the large object,
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must be called and carried out within a transaction.
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</simpara>
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</note>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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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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<para>
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A large object identifier.
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</para>
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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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<para>
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If mode is <literal>r</literal>, open the stream for reading.
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If mode is <literal>w</literal>, open the stream for writing.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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Returns a stream resource on success, or &false; on failure.
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title>A <function>PDO::pgsqlLOBOpen</function> example</title>
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<para>
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Following on from the <function>PDO::pgsqlLOBCreate</function>
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example, this code snippet retrieves the large object from
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the database and outputs it to the browser.
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</para>
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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: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', $lob, PDO::PARAM_LOB);
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$stmt->fetch(PDO::FETCH_BOUND);
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fpassthru($lob);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>PDO::pgsqlLOBCreate</function></member>
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<member><function>PDO::pgsqlLOBUnlink</function></member>
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<member><function>pg_lo_open</function></member>
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</simplelist>
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</para>
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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:"../../../../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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