mirror of
https://github.com/sigmasternchen/php-doc-en
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008a657c1a
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@172550 c90b9560-bf6c-de11-be94-00142212c4b1
143 lines
3.7 KiB
XML
143 lines
3.7 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-select-db">
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<refnamediv>
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<refname>mysqli_select_db</refname>
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<refname>mysqli->select_db</refname>
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<refpurpose>Selects the default database for database queries</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>bool</type><methodname>mysqli_select_db</methodname>
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<methodparam><type>mysqli</type><parameter>link</parameter></methodparam>
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<methodparam><type>string</type><parameter>dbname</parameter></methodparam>
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</methodsynopsis>
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<para>
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The <function>mysqli_select_db</function> function selects the default
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database (specified by the <parameter>dbname</parameter> parameter) to be
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used when performing queries against the database connection
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represented by the <parameter>link</parameter> parameter.
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</para>
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<note>
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<para>
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This function should only be used to change the default database for the connection.
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You can select the default database with 4th parameter in <function>mysqli_connect</function>.
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</para>
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</note>
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</refsect1>
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<refsect1>
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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>
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&reftitle.seealso;
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<para>
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<function>mysqli_connect</function>&listendand;
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<function>mysqli_real_connect</function>.
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</para>
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</refsect1>
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<refsect1>
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&reftitle.examples;
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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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$mysqli = new mysqli("localhost", "my_user", "my_password", "test");
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/* check connection */
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if (mysqli_connect_errno()) {
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printf("Connect failed: %s\n", mysqli_connect_error());
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exit();
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}
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/* return name of current default database */
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if ($result = $mysqli->query("SELECT DATABASE()")) {
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$row = $result->fetch_row();
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printf("Default database is %s.\n", $row[0]);
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$result->close();
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}
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/* change db to world db */
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$mysqli->select_db("world");
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/* return name of current default database */
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if ($result = $mysqli->query("SELECT DATABASE()")) {
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$row = $result->fetch_row();
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printf("Default database is %s.\n", $row[0]);
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$result->close();
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}
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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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/* 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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/* return name of current default database */
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if ($result = mysqli_query($link, "SELECT DATABASE()")) {
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$row = mysqli_fetch_row($result);
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printf("Default database is %s.\n", $row[0]);
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mysqli_free_result($result);
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}
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/* change db to world db */
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mysqli_select_db($link, "world");
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/* return name of current default database */
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if ($result = mysqli_query($link, "SELECT DATABASE()")) {
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$row = mysqli_fetch_row($result);
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printf("Default database is %s.\n", $row[0]);
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mysqli_free_result($result);
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}
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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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&example.outputs;
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<screen>
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<![CDATA[
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Default database is test.
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Default database is world.
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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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