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https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@228275 c90b9560-bf6c-de11-be94-00142212c4b1
300 lines
8.9 KiB
XML
300 lines
8.9 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-real-connect">
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<refnamediv>
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<refname>mysqli_real_connect</refname>
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<refname>mysqli->real_connect()</refname>
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<refpurpose>Opens a connection to a mysql server</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<para>Procedural style</para>
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<methodsynopsis>
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<type>bool</type><methodname>mysqli_real_connect</methodname>
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<methodparam><type>mysqli</type><parameter>link</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>host</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>username</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>passwd</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>dbname</parameter></methodparam>
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<methodparam choice='opt'><type>int</type><parameter>port</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>socket</parameter></methodparam>
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<methodparam choice='opt'><type>int</type><parameter>flags</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>mysqli</classname></ooclass>
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<methodsynopsis>
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<type>bool</type><methodname>real_connect</methodname>
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<methodparam choice='opt'><type>string</type><parameter>host</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>username</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>passwd</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>dbname</parameter></methodparam>
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<methodparam choice='opt'><type>int</type><parameter>port</parameter></methodparam>
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<methodparam choice='opt'><type>string</type><parameter>socket</parameter></methodparam>
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<methodparam choice='opt'><type>int</type><parameter>flags</parameter></methodparam>
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</methodsynopsis>
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</classsynopsis>
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<para>
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Establish a connection to a MySQL database engine.
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</para>
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<para>
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This function differs from <function>mysqli_connect</function>:
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</para>
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<itemizedlist>
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<listitem>
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<para>
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<function>mysqli_real_connect</function> needs a valid object which has
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to be created by function <function>mysqli_init</function>
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</para>
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</listitem>
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<listitem>
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<para>
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With function <function>mysqli_options</function> you can set various
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options for connection.
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</para>
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</listitem>
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<listitem>
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<para>
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There is a <parameter>flags</parameter> parameter.
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</para>
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</listitem>
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</itemizedlist>
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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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&mysqli.link.description;
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<varlistentry>
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<term><parameter>host</parameter></term>
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<listitem>
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<para>
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Can be either a host name or an IP address. Passing the &null; value
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or the string "localhost" to this parameter, the local host is
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assumed. When possible, pipes will be used instead of the TCP/IP
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protocol.
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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>username</parameter></term>
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<listitem>
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<para>
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The MySQL user name.
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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>passwd</parameter></term>
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<listitem>
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<para>
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If provided or &null;, the MySQL server will attempt to authenticate
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the user against those user records which have no password only. This
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allows one username to be used with different permissions (depending
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on if a password as provided or not).
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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>dbname</parameter></term>
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<listitem>
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<para>
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If provided will specify the default database to be used when
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performing queries.
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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>port</parameter></term>
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<listitem>
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<para>
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Specifies the port number to attempt to connect to the MySQL server.
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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>socket</parameter></term>
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<listitem>
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<para>
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Specifies the socket or named pipe that should be used.
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</para>
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<note>
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<para>
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Specifying the <parameter>socket</parameter> parameter will not
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explicitly determine the type of connection to be used when
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connecting to the MySQL server. How the connection is made to the
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MySQL database is determined by the <parameter>host</parameter>
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parameter.
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</para>
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</note>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>flags</parameter></term>
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<listitem>
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<para>
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With the parameter <parameter>flags</parameter> you can set different
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connection options:
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</para>
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<table>
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<title>Supported flags</title>
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<tgroup cols='2'>
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<thead>
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<row>
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<entry>Name</entry>
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<entry>Description</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry><constant>MYSQLI_CLIENT_COMPRESS</constant></entry>
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<entry>Use compression protocol</entry>
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</row>
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<row>
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<entry><constant>MYSQLI_CLIENT_FOUND_ROWS</constant></entry>
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<entry>return number of matched rows, not the number of affected rows</entry>
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</row>
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<row>
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<entry><constant>MYSQLI_CLIENT_IGNORE_SPACE</constant></entry>
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<entry>Allow spaces after function names. Makes all function names reserved words.</entry>
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</row>
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<row>
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<entry><constant>MYSQLI_CLIENT_INTERACTIVE</constant></entry>
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<entry>
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Allow <literal>interactive_timeout</literal> seconds (instead of
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<literal>wait_timeout</literal> seconds) of inactivity before closing the connection
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</entry>
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</row>
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<row>
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<entry><constant>MYSQLI_CLIENT_SSL</constant></entry>
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<entry>Use SSL (encryption)</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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<note>
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<para>
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For security reasons the <constant>MULTI_STATEMENT</constant> flag is
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not supported in PHP. If you want to execute multiple queries use the
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<function>mysqli_multi_query</function> function.
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</para>
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</note>
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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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&return.success;
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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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<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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/* create a connection object which is not connected */
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$mysqli = mysqli_init();
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/* set connection options */
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$mysqli->options(MYSQLI_INIT_COMMAND, "SET AUTOCOMMIT=0");
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$mysqli->options(MYSQLI_OPT_CONNECT_TIMEOUT, 5);
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/* connect to server */
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$mysqli->real_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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printf ("Connection: %s\n.", $mysqli->host_info);
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$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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/* create a connection object which is not connected */
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$link = mysqli_init();
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/* set connection options */
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mysqli_options($link, MYSQLI_INIT_COMMAND, "SET AUTOCOMMIT=0");
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mysqli_options($link, MYSQLI_OPT_CONNECT_TIMEOUT, 5);
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/* connect to server */
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mysqli_real_connect($link, '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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printf ("Connection: %s\n.", mysqli_get_host_info($link));
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mysqli_close($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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Connection: Localhost via UNIX socket
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]]>
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</screen>
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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>mysqli_connect</function></member>
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<member><function>mysqli_init</function></member>
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<member><function>mysqli_options</function></member>
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<member><function>mysqli_ssl_set</function></member>
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<member><function>mysqli_close</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:"../../../../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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