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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.80 -->
<refentry xml:id='function.pg-update' xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_update</refname>
<refpurpose>
Update table
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>mixed</type><methodname>pg_update</methodname>
<methodparam><type>resource</type><parameter>connection</parameter></methodparam>
<methodparam><type>string</type><parameter>table_name</parameter></methodparam>
<methodparam><type>array</type><parameter>data</parameter></methodparam>
<methodparam><type>array</type><parameter>condition</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>options</parameter><initializer>PGSQL_DML_EXEC</initializer></methodparam>
</methodsynopsis>
<para>
<function>pg_update</function> updates records that matches
<literal>condition</literal> with <literal>data</literal>. If
<literal>options</literal> is specified,
<function>pg_convert</function> is applied to
<literal>data</literal> with specified options.
</para>
&warn.experimental.func;
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>connection</parameter></term>
<listitem>
<para>
PostgreSQL database connection resource.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>table_name</parameter></term>
<listitem>
<para>
Name of the table into which to update rows.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
An <type>array</type> whose keys are field names in the table <parameter>table_name</parameter>,
and whose values are what matched rows are to be updated to.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>condition</parameter></term>
<listitem>
<para>
An <type>array</type> whose keys are field names in the table <parameter>table_name</parameter>,
and whose values are the conditions that a row must meet to be updated.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>options</parameter></term>
<listitem>
<para>
Any number of <constant>PGSQL_CONV_OPTS</constant>,
<constant>PGSQL_DML_NO_CONV</constant>,
<constant>PGSQL_DML_EXEC</constant> or
<constant>PGSQL_DML_STRING</constant> combined. If <constant>PGSQL_DML_STRING</constant> is part of the
<parameter>options</parameter> then query string is returned.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success; Returns <type>string</type> if <constant>PGSQL_DML_STRING</constant> is passed
via <parameter>options</parameter>.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>pg_update</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$db = pg_connect('dbname=foo');
$data = array('field1'=>'AA', 'field2'=>'BB');
// This is safe, since $_POST is converted automatically
$res = pg_update($db, 'post_log', $_POST, $data);
if ($res) {
echo "Data is updated: $res\n";
} else {
echo "User must have sent wrong inputs\n";
}
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_convert</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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