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* Update pg-lo-seek.xml * Update pg-lo-tell.xml * Update pg-lo-write.xml * Update pg-num-fields.xml * Update pg-lo-seek.xml * Update pg-lo-tell.xml * Update pg-lo-write.xml
146 lines
3.9 KiB
XML
Executable File
146 lines
3.9 KiB
XML
Executable File
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: c2eca73ef79ebe78cebb34053e41b565af504c4f Maintainer: dallas Status: ready -->
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<!-- CREDITS: mowangjuanzi -->
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<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.2 -->
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<refentry xml:id="function.pg-lo-write" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>pg_lo_write</refname>
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<refpurpose>向大对象写入数据</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 class="union"><type>int</type><type>false</type></type><methodname>pg_lo_write</methodname>
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<methodparam><type>PgSql\Lob</type><parameter>lob</parameter></methodparam>
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<methodparam><type>string</type><parameter>data</parameter></methodparam>
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<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>length</parameter><initializer>&null;</initializer></methodparam>
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</methodsynopsis>
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<para>
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<function>pg_lo_write</function> 在大对象的当前位置写入数据。
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</para>
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<para>
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要使用大对象接口，必须将其封装在一个事务块中。
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</para>
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<note>
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<para>
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本函数以前的名字为 <function>pg_lowrite</function>。
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</para>
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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>lob</parameter></term>
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<listitem>
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&pgsql.parameter.lob;
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>data</parameter></term>
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<listitem>
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<para>
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写入到大对象中的数据。如果 <parameter>length</parameter> 是 <type>int</type> 并且少于
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<parameter>data</parameter> 的长度，仅会写入 <parameter>length</parameter> 个字节。
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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>length</parameter></term>
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<listitem>
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<para>
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可选的最大写入字节数。必须大于零且不大于 <parameter>data</parameter> 的长度。默认为 <parameter>data</parameter> 的长度。
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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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写入到大对象的字节数，或出错时为 &false;。
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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&pgsql.changelog.lob-object;
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<row>
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<entry>8.0.0</entry>
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<entry>
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<parameter>length</parameter> 现在可为 null。
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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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><function>pg_lo_write</function> 示例</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$doc_oid = 189762345;
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$data = "This will overwrite the start of the large object.";
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$database = pg_connect("dbname=jacarta");
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pg_query($database, "begin");
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$handle = pg_lo_open($database, $doc_oid, "w");
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$data = pg_lo_write($handle, $data);
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pg_query($database, "commit");
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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>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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</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:"~/.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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