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
173 lines
4.2 KiB
XML
173 lines
4.2 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.8 $ -->
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<refentry id="function.mysqli-rollback">
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<refnamediv>
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<refname>mysqli_rollback</refname>
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<refname>mysqli->rollback</refname>
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<refpurpose>Rolls back current transaction</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_rollback</methodname>
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<methodparam><type>mysqli</type><parameter>link</parameter></methodparam>
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</methodsynopsis>
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<classsynopsis>
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<ooclass><classname>mysqli</classname></ooclass>
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<methodsynopsis>
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<type>bool</type><methodname>rollback</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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Rollbacks the current transaction for the database specified by the
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<parameter>link</parameter> parameter.
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</para>
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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_commit</function>&listendand;
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<function>mysqli_autocommit</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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$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
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/* check connection */
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if (mysqli_connect_errno()) {
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printf("Connect failed: %s\n", mysqli_connect_error());
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exit();
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}
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/* disable autocommit */
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$mysqli->autocommit(FALSE);
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$mysqli->query("CREATE TABLE myCity LIKE City");
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$mysqli->query("ALTER TABLE myCity Type=InnoDB");
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$mysqli->query("INSERT INTO myCity SELECT * FROM City LIMIT 50");
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/* commit insert */
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$mysqli->commit();
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/* delete all rows */
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$mysqli->query("DELETE FROM myCity");
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if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) {
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$row = $result->fetch_row();
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printf("%d rows in table myCity.\n", $row[0]);
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/* Free result */
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$result->close();
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}
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/* Rollback */
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$mysqli->rollback();
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if ($result = $mysqli->query("SELECT COUNT(*) FROM myCity")) {
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$row = $result->fetch_row();
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printf("%d rows in table myCity (after rollback).\n", $row[0]);
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/* Free result */
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$result->close();
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}
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/* Drop table myCity */
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$mysqli->query("DROP TABLE myCity");
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$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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$link = mysqli_connect("localhost", "my_user", "my_password", "world");
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/* check connection */
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if (mysqli_connect_errno()) {
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printf("Connect failed: %s\n", mysqli_connect_error());
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exit();
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}
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/* disable autocommit */
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mysqli_autocommit($link, FALSE);
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mysqli_query($link, "CREATE TABLE myCity LIKE City");
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mysqli_query($link, "ALTER TABLE myCity Type=InnoDB");
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mysqli_query($link, "INSERT INTO myCity SELECT * FROM City LIMIT 50");
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/* commit insert */
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mysqli_commit($link);
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/* delete all rows */
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mysqli_query($link, "DELETE FROM myCity");
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if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) {
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$row = mysqli_fetch_row($result);
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printf("%d rows in table myCity.\n", $row[0]);
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/* Free result */
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mysqli_free_result($result);
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}
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/* Rollback */
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mysqli_rollback($link);
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if ($result = mysqli_query($link, "SELECT COUNT(*) FROM myCity")) {
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$row = mysqli_fetch_row($result);
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printf("%d rows in table myCity (after rollback).\n", $row[0]);
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/* Free result */
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mysqli_free_result($result);
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}
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/* Drop table myCity */
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mysqli_query($link, "DROP TABLE myCity");
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mysqli_close($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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0 rows in table myCity.
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50 rows in table myCity (after rollback).
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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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