mirror of
https://github.com/sigmasternchen/php-doc-en
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ccba0320cb
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@160642 c90b9560-bf6c-de11-be94-00142212c4b1
126 lines
3.4 KiB
XML
126 lines
3.4 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.9 $ -->
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<refentry id="function.mysqli-field-count">
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<refnamediv>
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<refname>mysqli_field_count</refname>
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<refname>mysqli->field_count</refname>
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<refpurpose>Returns the number of columns for the most recent query</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<para>Procedural style:</para>
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<methodsynopsis>
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<type>int</type><methodname>mysqli_field_count</methodname>
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<methodparam><type>object</type><parameter>link</parameter></methodparam>
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</methodsynopsis>
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<para>Object oriented style (method):</para>
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<classsynopsis>
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<ooclass><classname>mysql</classname></ooclass>
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<methodsynopsis>
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<type>int</type>
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<methodname>field_count</methodname>
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<void />
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</methodsynopsis>
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</classsynopsis>
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<para>
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Returns the number of columns for the most recent query on the connection
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represented by the <parameter>link</parameter> parameter. This function
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can be useful when using the <function>mysqli_store_result</function>
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function to determine if the query should have produced a non-empty result
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set or not without knowing the nature of the query.
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</para>
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</refsect1>
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<refsect1>
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<title>Return values</title>
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<para>An integer representing the number of fields in a result set</para>
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</refsect1>
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<refsect1>
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<title>Example</title>
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<para>
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<example>
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<title>Object oriented style</title>
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<programlisting role='php'>
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<![CDATA[
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<?php
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$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
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$mysqli->query( "DROP TABLE IF EXISTS friends");
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$mysqli->query( "CREATE TABLE friends (id int, name varchar(20))");
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$mysqli->query( "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");
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$mysqli->real_query($HTTP_POST_VARS['query']);
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if (mysqli_field_count($link)) {
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/* this was a select/show or describe query */
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$result = $mysqli->store_result();
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/* process resultset */
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$row = $result->fetch_row();
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/* free resultset */
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$result->close();
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}
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/* close connection */
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$mysqli->close();
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?>
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]]>
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</programlisting>
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</example>
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<example>
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<title>Procedural style</title>
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<programlisting role='php'>
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<![CDATA[
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<?php
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$link = mysqli_connect("localhost", "my_user", "my_password", "test");
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mysqli_query($link, "DROP TABLE IF EXISTS friends");
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mysqli_query($link, "CREATE TABLE friends (id int, name varchar(20))");
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mysqli_query($link, "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");
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mysqli_real_query($link, $HTTP_POST_VARS['query']);
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if (mysqli_field_count($link)) {
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/* this was a select/show or describe query */
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$result = mysqli_store_result($link);
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/* process resultset */
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$row = mysqli_fetch_row($result);
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/* free resultset */
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mysqli_free_result($result);
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}
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/* close connection */
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mysqli_close($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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</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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