<?xml version="1.0" encoding="utf-8"?>

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<refentry xml:id="function.pg-free-result" xmlns="http://docbook.org/ns/docbook">

<refnamediv>

<refname>pg_free_result</refname>

<refpurpose>释放查询结果占用的内存</refpurpose>

</refnamediv>

<refsect1 role="description">

&reftitle.description;

<methodsynopsis>

<type>bool</type><methodname>pg_free_result</methodname>

<methodparam><type>PgSql\Result</type><parameter>result</parameter></methodparam>

</methodsynopsis>

<para>

<function>pg_free_result</function> 释放与指定 <classname>PgSql\Result</classname> 实例关联的内存和数据。

</para>

<para>

仅当脚本执行期间的内存消耗成为问题时才需要调用此函数。否则，所有结果内存将在脚本结束时自动释放。

</para>

<note>

<para>

本函数以前的名字为 <function>pg_freeresult</function>。

</para>

</note>

</refsect1>

<refsect1 role="parameters">

&reftitle.parameters;

<para>

<variablelist>

<varlistentry>

<term><parameter>result</parameter></term>

<listitem>

&pgsql.parameter.result;

</listitem>

</varlistentry>

</variablelist>

</para>

</refsect1>

<refsect1 role="returnvalues">

&reftitle.returnvalues;

<para>

&return.success;

</para>

</refsect1>

<refsect1 role="changelog">

&reftitle.changelog;

<informaltable>

<tgroup cols="2">

<thead>

<row>

<entry>&Version;</entry>

<entry>&Description;</entry>

</row>

</thead>

<tbody>

&pgsql.changelog.result-object;

</tbody>

</tgroup>

</informaltable>

</refsect1>

<refsect1 role="examples">

&reftitle.examples;

<para>

<example>

<title><function>pg_free_result</function> 示例</title>

<programlisting role="php">

<![CDATA[

<?php

$db = pg_connect("dbname=users user=me");

$res = pg_query($db, "SELECT 1 UNION ALL SELECT 2");

$val = pg_fetch_result($res, 1, 0);

echo "First field in the second row is: ", $val, "\n";

pg_free_result($res);

?>

]]>

</programlisting>

&example.outputs;

<screen>

<![CDATA[

First field in the second row is: 2

]]>

</screen>

</example>

</para>

</refsect1>

<refsect1 role="seealso">

&reftitle.seealso;

<para>

<simplelist>

<member><function>pg_query</function></member>

<member><function>pg_query_params</function></member>

<member><function>pg_execute</function></member>

<member><function>pg_result_memory_size</function></member>

</simplelist>

</para>

</refsect1>

</refentry>

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