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# Also rollback a change that shouldn't have make it in the last commit git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@226684 c90b9560-bf6c-de11-be94-00142212c4b1
126 lines
3.3 KiB
XML
126 lines
3.3 KiB
XML
<?xml version='1.0' encoding='iso-8859-1'?>
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<!-- $Revision: 1.7 $ -->
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<refentry id="function.PDOStatement-fetchColumn">
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<refnamediv>
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<refname>PDOStatement->fetchColumn()</refname>
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<refpurpose>
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Returns a single column from the next row of a result set
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</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<classsynopsis>
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<ooclass><classname>PDOStatement</classname></ooclass>
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<methodsynopsis>
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<type>string</type><methodname>fetchColumn</methodname>
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<methodparam choice="opt"><type>int</type><parameter>column_number</parameter></methodparam>
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</methodsynopsis>
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</classsynopsis>
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<para>
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Returns a single column from the next row of a result set or &false; if
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there are no more rows.
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</para>
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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>column_number</parameter></term>
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<listitem>
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<para>
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0-indexed number of the column you wish to retrieve from the row. If
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no value is supplied, <xref linkend="function.PDOStatement-fetchColumn" />
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fetches the first column.
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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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<xref linkend="function.PDOStatement-fetchColumn" /> returns a single column
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in the next row of a result set.
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</para>
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<warning>
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<para>
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There is no way to return another column from the same row if you
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use <xref linkend="function.PDOStatement-fetchColumn" /> to retrieve data.
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</para>
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</warning>
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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><title>Return first column of the next row</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$sth = $dbh->prepare("SELECT name, colour FROM fruit");
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$sth->execute();
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/* Fetch the first column from the next row in the result set */
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print("Fetch the first column from the next row in the result set:\n");
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$result = $sth->fetchColumn();
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print("name = $result\n");
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print("Fetch the second column from the next row in the result set:\n");
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$result = $sth->fetchColumn(1);
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print("colour = $result\n");
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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Fetch the first column from the next row in the result set:
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name = lemon
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Fetch the second column from the next row in the result set:
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colour = red
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]]>
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</screen>
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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><xref linkend="function.PDO-query" /></member>
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<member><xref linkend="function.PDOStatement-fetch" /></member>
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<member><xref linkend="function.PDOStatement-fetchAll" /></member>
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<member><xref linkend="function.PDO-prepare" /></member>
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<member><xref linkend="function.PDOStatement-setFetchMode" /></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:"../../../../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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