mirror of
https://github.com/sigmasternchen/php-doc-en
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96c9d88bad
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@297028 c90b9560-bf6c-de11-be94-00142212c4b1
142 lines
4 KiB
XML
142 lines
4 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.mysql-result" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>mysql_result</refname>
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<refpurpose>Get result data</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>string</type><methodname>mysql_result</methodname>
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<methodparam><type>resource</type><parameter>result</parameter></methodparam>
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<methodparam><type>int</type><parameter>row</parameter></methodparam>
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<methodparam choice="opt"><type>mixed</type><parameter>field</parameter><initializer>0</initializer></methodparam>
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</methodsynopsis>
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<para>
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Retrieves the contents of one cell from a MySQL result set.
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</para>
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<para>
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When working on large result sets, you should consider using one
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of the functions that fetch an entire row (specified below). As
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these functions return the contents of multiple cells in one
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function call, they're MUCH quicker than
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<function>mysql_result</function>. Also, note that specifying a
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numeric offset for the field argument is much quicker than
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specifying a fieldname or tablename.fieldname argument.
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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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&mysql.result.description;
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<varlistentry>
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<term><parameter>row</parameter></term>
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<listitem>
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<para>
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The row number from the result that's being retrieved. Row numbers
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start at <literal>0</literal>.
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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>field</parameter></term>
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<listitem>
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<para>
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The name or offset of the field being retrieved.
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</para>
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<para>
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It can be the field's offset, the field's name, or the field's table
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dot field name (tablename.fieldname). If the column name has been
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aliased ('select foo as bar from...'), use the alias instead of the
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column name. If undefined, the first field is retrieved.
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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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The contents of one cell from a MySQL result set on success, or
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&false; on failure.
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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>mysql_result</function> example</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
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if (!$link) {
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die('Could not connect: ' . mysql_error());
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}
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if (!mysql_select_db('database_name')) {
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die('Could not select database: ' . mysql_error());
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}
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$result = mysql_query('SELECT name FROM work.employee');
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if (!$result) {
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die('Could not query:' . mysql_error());
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}
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echo mysql_result($result, 2); // outputs third employee's name
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mysql_close($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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Calls to <function>mysql_result</function> should not be mixed
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with calls to other functions that deal with the result set.
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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>mysql_fetch_row</function></member>
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<member><function>mysql_fetch_array</function></member>
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<member><function>mysql_fetch_assoc</function></member>
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<member><function>mysql_fetch_object</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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