mirror of
https://github.com/sigmasternchen/php-doc-en
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e23aecf36a
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@161085 c90b9560-bf6c-de11-be94-00142212c4b1
151 lines
4.1 KiB
XML
151 lines
4.1 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.12 $ -->
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<refentry id="function.mysqli-fetch-lengths">
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<refnamediv>
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<refname>mysqli_fetch_lengths</refname>
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<refname>result->lengths</refname>
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<refpurpose>Returns the lengths of the columns of the current row in the result set</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>mixed</type><methodname>mysqli_fetch_lengths</methodname>
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<methodparam><type>object</type><parameter>result</parameter></methodparam>
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</methodsynopsis>
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<para>Object oriented style (property):</para>
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<classsynopsis>
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<ooclass><classname>result</classname></ooclass>
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<fieldsynopsis><type>mixed</type><varname>lengths</varname></fieldsynopsis>
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</classsynopsis>
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<para>
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The <function>mysqli_fetch_lengths</function> function returns an array containing the
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lengths of every column of the current row within the result set represented by the
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<parameter>result</parameter> parameter. If successful, a numerically indexed array
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representing the lengths of each column is returned or &false; on failure.
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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>
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An array of integers representing the size of each column (not including
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any terminating null characters). &false; if an error occurred.
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</para>
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<para>
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<function>mysqli_fetch_lengths</function> is valid only for the current row of the result set.
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It returns &false; if you call it before calling mysqli_fetch_row/array/object or after retrieving
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all rows in the result.
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</para>
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</refsect1>
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<refsect1>
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<title>Example</title>
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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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$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
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/* check connection */
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if (mysqli_connect_errno()) {
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printf("Connect failed: %s\n", mysqli_connect_error());
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exit();
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}
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$query = "SELECT * from Country ORDER BY Code LIMIT 1";
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if ($result = $mysqli->query($query)) {
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$row = $result->fetch_row();
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/* display column lengths */
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for ($i=0; $i < count($result->lengths); $i++) {
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printf("Field %2d has Length %2d\n", $i+1, $result->lengths[$i]);
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}
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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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$link = mysqli_connect("localhost", "my_user", "my_password", "world");
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/* check connection */
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if (mysqli_connect_errno()) {
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printf("Connect failed: %s\n", mysqli_connect_error());
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exit();
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}
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$query = "SELECT * from Country ORDER BY Code LIMIT 1";
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if ($result = mysqli_query($link, $query)) {
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$row = mysqli_fetch_row($result);
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/* display column lengths */
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$lengths = mysqli_fetch_lengths($result);
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for ($i=0; $i < count($lengths); $i++) {
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printf("Field %2d has Length %2d\n", $i+1, $lengths[$i]);
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}
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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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The above examples would produce the following output:
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</para>
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<screen>
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<![CDATA[
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Field 1 has Length 3
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Field 2 has Length 5
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Field 3 has Length 13
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Field 4 has Length 9
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Field 5 has Length 6
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Field 6 has Length 1
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Field 7 has Length 6
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Field 8 has Length 4
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Field 9 has Length 6
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Field 10 has Length 6
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Field 11 has Length 5
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Field 12 has Length 44
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Field 13 has Length 7
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Field 14 has Length 3
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Field 15 has Length 2
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]]>
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</screen>
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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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