php-doc-en/reference/pdo_odbc/reference.xml

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 <reference id="ref.pdo-odbc">
  <title>ODBC and DB2 functions (PDO_ODBC)</title>
  <titleabbrev>ODBC and DB2 (PDO)</titleabbrev>
  <partintro>

   <section id="pdo-odbc.intro">
   &reftitle.intro;
    <para>
     &warn.experimental;
     PDO_ODBC is a driver that implements the PHP Data Objects (PDO) interface
     to enable access from PHP to databases through ODBC drivers or through the
     IBM DB2 Call Level Interface (DB2 CLI) library.
    </para>
    <para>
     On Windows, PDO_ODBC is built into the PHP core by default. It is linked
     against the Windows ODBC Driver Manager so that PHP can connect to any
     database cataloged as a System DSN, and is the recommended driver for
     connecting to Microsoft SQL Server databases.
    </para>
   </section>
  </partintro>

  <refentry id="ref.pdo-odbc.connection">
   <refnamediv>
    <refname>PDO_ODBC DSN</refname>
    <refpurpose>Connecting to ODBC or DB2 databases</refpurpose>
   </refnamediv>

   <refsect1 role="description">
    &reftitle.description;
    <para>
     The PDO_ODBC Data Source Name (DSN) is composed of the following elements:
     <variablelist>
      <varlistentry>
       <term>DSN prefix</term>
       <listitem>
        <para>
        The DSN prefix is <userinput>odbc:</userinput>. If you are connecting
        to a database cataloged in the ODBC driver manager or the DB2 catalog,
        you can append the cataloged name of the database to the DSN.
        </para>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term><constant>DSN</constant></term>
       <listitem>
        <para>
         The name of the database as cataloged in the ODBC driver manager or
         the DB2 catalog. Alternately, you can provide a complete ODBC
         connection string to connect to a database as described at
         <ulink url="http://connectionstrings.com"/>.
        </para>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term><constant>UID</constant></term>
       <listitem>
        <para>
         The name of the user for the connection. If you specify the user name
         in the DSN, PDO ignores the value of the user name argument in the
         PDO constructor.
        </para>
       </listitem>
      </varlistentry>
      <varlistentry>
       <term><constant>PWD</constant></term>
       <listitem>
        <para>
         The password of the user for the connection. If you specify the
         password in the DSN, PDO ignores the value of the password argument
         in the PDO constructor.
        </para>
       </listitem>
      </varlistentry>
     </variablelist>
    </para>
   </refsect1>
   <refsect1 role="examples">
    &reftitle.examples;
    <para>
     <example>
      <title>PDO_ODBC DSN example (ODBC driver manager)</title>
      <para>
       The following example shows a PDO_ODBC DSN for connecting to
       an ODBC database cataloged as testdb in the ODBC driver manager:
       <programlisting><![CDATA[
odbc:testdb
]]>
       </programlisting>
      </para>
     </example>
     <example>
      <title>PDO_ODBC DSN example (IBM DB2 uncataloged connection)</title>
      <para>
       The following example shows a PDO_ODBC DSN for connecting to
       an IBM DB2 database named <userinput>SAMPLE</userinput> using the full
       ODBC DSN syntax:
       <programlisting><![CDATA[
odbc:DSN={IBM DB2 ODBC};HOSTNAME=localhost;PORT=50000;DBNAME=SAMPLE;PROTOCOL=TCPIP;UID=db2inst1;PWD=ibmdb2;
]]>
       </programlisting>
      </para>
     </example>

    </para>
   </refsect1>
  </refentry>

 </reference>
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