php-doc-en/reference/oci8/functions/oci-pconnect.xml

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<refentry xml:id="function.oci-pconnect" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>oci_pconnect</refname>
  <refpurpose>Connect to an Oracle database using a persistent connection</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>resource</type><methodname>oci_pconnect</methodname>
   <methodparam><type>string</type><parameter>username</parameter></methodparam>
   <methodparam><type>string</type><parameter>password</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>connection_string</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>character_set</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>session_mode</parameter></methodparam>
  </methodsynopsis>
  <para>
   Creates a persistent connection to an Oracle server and logs on. 
  </para>
  <para>
   Persistent connections are cached and re-used between requests, resulting
   in reduced overhead on each page load; a typical PHP application will have
   a single persistent connection open against an  Oracle server per Apache
   child process (or PHP FastCGI/CGI process). See the <link
   linkend="features.persistent-connections">Persistent Database
   Connections</link> section for more information.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>username</parameter></term>
     <listitem>
      <para>
       The Oracle user name.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>password</parameter></term>
     <listitem>
      <para>
       The password for <parameter>username</parameter>.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>connection_string</parameter></term>
     <listitem>
      &oci.db;
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>character_set</parameter></term>
     <listitem>
      &oci.charset;
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>session_mode</parameter></term>
     <listitem>
      &oci.sessionmode;
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns a connection identifier or &false; on error.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Basic <function>oci_pconnect</function> Example using Easy Connect syntax</title>
    <programlisting role="php">
<![CDATA[
<?php

// Connects to the XE service (i.e. database) on the "localhost" machine
$conn = oci_pconnect('hr', 'welcome', 'localhost/XE');
if (!$conn) {
    $e = oci_error();
    trigger_error(htmlentities($e['message'], ENT_QUOTES), E_USER_ERROR);
}

$stid = oci_parse($conn, 'SELECT * FROM employees');
oci_execute($stid);

echo "<table border='1'>\n";
while ($row = oci_fetch_array($stid, OCI_ASSOC+OCI_RETURN_NULLS)) {
    echo "<tr>\n";
    foreach ($row as $item) {
        echo "    <td>" . ($item !== null ? htmlentities($item, ENT_QUOTES) : "&nbsp;") . "</td>\n";
    }
    echo "</tr>\n";
}
echo "</table>\n";

?>
]]>
    </programlisting>
   </example>
  </para>
  <para>
    See <function>oci_connect</function> for further examples of parameter usage.
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  <note>
   <simpara>
    Starting with PHP 5.1.2 and PECL OCI8 1.1, the lifetime and
    maximum number of persistent Oracle connections per PHP process can be tuned by setting
    the following configuration values: <link
     linkend="ini.oci8.persistent-timeout">oci8.persistent_timeout</link>,
    <link linkend="ini.oci8.ping-interval">oci8.ping_interval</link> and
    <link linkend="ini.oci8.max-persistent">oci8.max_persistent</link>.
   </simpara>
  </note>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>oci_connect</function></member>
    <member><function>oci_new_connect</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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