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pg-lo-write.xml
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executable file
·145 lines (139 loc) · 3.95 KB
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: c2eca73ef79ebe78cebb34053e41b565af504c4f Maintainer: dallas Status: ready -->
<!-- CREDITS: mowangjuanzi -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.2 -->
<refentry xml:id="function.pg-lo-write" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_lo_write</refname>
<refpurpose>向大对象写入数据</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>int</type><type>false</type></type><methodname>pg_lo_write</methodname>
<methodparam><type>PgSql\Lob</type><parameter>lob</parameter></methodparam>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
<methodparam choice="opt"><type class="union"><type>int</type><type>null</type></type><parameter>length</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
<function>pg_lo_write</function> 在大对象的当前位置写入数据。
</para>
<para>
要使用大对象接口，必须将其封装在一个事务块中。
</para>
<note>
<para>
本函数以前的名字为 <function>pg_lowrite</function>。
</para>
</note>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>lob</parameter></term>
<listitem>
&pgsql.parameter.lob;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
写入到大对象中的数据。如果 <parameter>length</parameter> 是 <type>int</type> 并且少于
<parameter>data</parameter> 的长度，仅会写入 <parameter>length</parameter> 个字节。
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>length</parameter></term>
<listitem>
<para>
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。
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
写入到大对象的字节数，或出错时为 &false;。
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&pgsql.changelog.lob-object;
<row>
<entry>8.0.0</entry>
<entry>
<parameter>length</parameter> 现在可为 null。
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>pg_lo_write</function> 示例</title>
<programlisting role="php">
<![CDATA[
<?php
$doc_oid = 189762345;
$data = "This will overwrite the start of the large object.";
$database = pg_connect("dbname=jacarta");
pg_query($database, "begin");
$handle = pg_lo_open($database, $doc_oid, "w");
$data = pg_lo_write($handle, $data);
pg_query($database, "commit");
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_lo_create</function></member>
<member><function>pg_lo_open</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->