mirror of
https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@297028 c90b9560-bf6c-de11-be94-00142212c4b1
126 lines
3.2 KiB
XML
126 lines
3.2 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.dbx-sort" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>dbx_sort</refname>
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<refpurpose>
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Sort a result from a dbx_query by a custom sort function
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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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<methodsynopsis>
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<type>bool</type><methodname>dbx_sort</methodname>
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<methodparam><type>object</type><parameter>result</parameter></methodparam>
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<methodparam><type>string</type><parameter>user_compare_function</parameter></methodparam>
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</methodsynopsis>
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<para>
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Sort a result from a <function>dbx_query</function> call with a custom sort
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function.
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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>result</parameter></term>
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<listitem>
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<para>
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A result set returned by <function>dbx_query</function>.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>user_compare_function</parameter></term>
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<listitem>
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<para>
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The user-defined comparison function. It must accept two arguments and
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return an integer less than, equal to, or greater than zero if the
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first argument is considered to be respectively less than, equal to,
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or greater than the second.
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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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&return.success;
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</para>
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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>
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<title><function>dbx_sort</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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function user_re_order($a, $b)
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{
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$rv = dbx_compare($a, $b, "parentid", DBX_CMP_DESC);
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if (!$rv) {
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$rv = dbx_compare($a, $b, "id", DBX_CMP_NUMBER);
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}
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return $rv;
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}
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$link = dbx_connect(DBX_ODBC, "", "db", "username", "password")
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or die("Could not connect");
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$result = dbx_query($link, "SELECT id, parentid, description FROM tbl ORDER BY id");
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// data in $result is now ordered by id
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dbx_sort($result, "user_re_order");
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// data in $result is now ordered by parentid (descending), then by id
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dbx_close($link);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<para>
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It is always better to use <literal>ORDER BY</literal>
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<literal>SQL</literal> clause instead of <function>dbx_sort</function>
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if possible.
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</para>
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</note>
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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><function>dbx_compare</function></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:"~/.phpdoc/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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