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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<!-- Generated by xml_proto.php v2.2. Found in /scripts directory of phpdoc. -->
<refentry id="function.db2-pconnect">
<refnamediv>
<refname>db2_pconnect</refname>
<refpurpose>
Returns a persistent connection to a database
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>resource</type><methodname>db2_pconnect</methodname>
<methodparam><type>string</type><parameter>database</parameter></methodparam>
<methodparam><type>string</type><parameter>username</parameter></methodparam>
<methodparam><type>string</type><parameter>password</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter>options</parameter></methodparam>
</methodsynopsis>
<para>
Returns a persistent connection to an IBM DB2 Universal Database, IBM
Cloudscape, or Apache Derby database. For more information on persistent
connections, refer to <xref linkend='features.persistent-connections' />.
</para>
<para>
Calling <function>db2_close</function> on a persistent connection always
returns &true;, but the underlying DB2 client connection remains open and
waiting to serve the next matching <function>db2_pconnect</function>
request.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>database</parameter></term>
<listitem>
<para>
The database alias in the DB2 client catalog.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>username</parameter></term>
<listitem>
<para>
The username with which you are connecting to the database.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>password</parameter></term>
<listitem>
<para>
The password with which you are connecting to the database.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>options</parameter></term>
<listitem>
<para>
An associative array of connection options that affect the behavior
of the connection, where valid array keys include:
<variablelist>
<varlistentry>
<term><parameter>autocommit</parameter></term>
<listitem>
<para>
Passing the <literal>DB2_AUTOCOMMIT_ON</literal> value turns
autocommit on for this connection handle.
</para>
<para>
Passing the <literal>DB2_AUTOCOMMIT_OFF</literal> value turns
autocommit off for this connection handle.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>DB2_ATTR_CASE</parameter></term>
<listitem>
<para>
Passing the <literal>DB2_CASE_NATURAL</literal> value specifies
that column names are returned in natural case.
</para>
<para>
Passing the <literal>DB2_CASE_LOWER</literal> value specifies
that column names are returned in lower case.
</para>
<para>
Passing the <literal>DB2_CASE_UPPER</literal> value specifies
that column names are returned in upper case.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>CURSOR</parameter></term>
<listitem>
<para>
Passing the <literal>DB2_FORWARD_ONLY</literal> value specifies a
forward-only cursor for a statement resource. This is the default
cursor type and is supported on all database servers.
</para>
<para>
Passing the <literal>DB2_SCROLLABLE</literal> value specifies a
scrollable cursor for a statement resource. This mode enables
random access to rows in a result set, but currently is supported
only by IBM DB2 Universal Database.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns a connection handle resource if the connection attempt is
successful. <function>db2_pconnect</function> tries to reuse an existing
connection resource that exactly matches the
<parameter>database</parameter>, <parameter>username</parameter>, and
<parameter>password</parameter> parameters. If the connection attempt fails,
<function>db2_pconnect</function> returns &false;.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>A <function>db2_pconnect</function> example</title>
<para>
In the following example, the first call to
<function>db2_pconnect</function> returns a new persistent connection
resource. The second call to <function>db2_pconnect</function> returns
a persistent connection resource that simply reuses the first persistent
connection resource.
</para>
<programlisting role="php">
<![CDATA[
<?php
$database = 'SAMPLE';
$user = 'db2inst1';
$password = 'ibmdb2';
$pconn = db2_pconnect($database, $user, $password);
if ($pconn) {
echo "Persistent connection succeeded.";
}
else {
echo "Persistent connection failed.";
}
$pconn2 = db2_pconnect($database, $user, $password);
if ($pconn) {
echo "Second persistent connection succeeded.";
}
else {
echo "Second persistent connection failed.";
}
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Persistent connection succeeded.
Second persistent connection succeeded.
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>db2_connect</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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