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php-doc-ru/reference/pgsql/functions/pg-num-fields.xml
Andrey S. Bezrukov cf1d021e9e Added translation by K102
git-svn-id: https://svn.php.net/repository/phpdoc/ru/trunk@315186 c90b9560-bf6c-de11-be94-00142212c4b1
2011-08-19 10:49:19 +00:00

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<?xml version="1.0" encoding="utf-8"?>
<!-- EN-Revision: 96c9d88bad9a7d7d44bfb7f26c226df7ee9ddf26 Maintainer: aur Status: ready -->
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<!-- splitted from ./en/functions/pgsql.xml, last change in rev 1.2 -->
<refentry xml:id="function.pg-num-fields" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pg_num_fields</refname>
<refpurpose>Возвращает количество полей в выборке</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>pg_num_fields</methodname>
<methodparam><type>resource</type><parameter>result</parameter></methodparam>
</methodsynopsis>
<para>
<function>pg_num_fields</function> возвращает количество полей
(столбцов) в результате запроса PostgreSQL.
</para>
<note>
<para>
Ранее функция называлась <function>pg_numfields</function>.
</para>
</note>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>result</parameter></term>
<listitem>
<para>
Ресурс результата запроса PostgreSQL, возвращаемый функциями
<function>pg_query</function>, <function>pg_query_params</function>
или <function>pg_execute</function> (и прочих).
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Количество полей (столбцов) в выборке. В случае ошибки возвращает -1.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Пример использования <function>pg_num_fields</function></title>
<programlisting role="php">
<![CDATA[
<?php
$result = pg_query($conn, "SELECT 1, 2");
$num = pg_num_fields($result);
echo "Возвращено полей: " . $num . ".\n";
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Возвращено полей: 2.
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pg_num_rows</function></member>
<member><function>pg_affected_rows</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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