OCI_PCONNECT(3) 														   OCI_PCONNECT(3)

oci_pconnect - Connect to an Oracle database using a persistent connection

SYNOPSIS

       resource oci_pconnect (string  $username, string  $password, [string  $connection_string], [string  $character_set], [int  $session_mode])

DESCRIPTION

	Creates a persistent connection to an Oracle server and logs on.

	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  Per-
       sistent Database Connections section for more information.

PARAMETERS

	      o $username
		- The Oracle user name.

	      o $password
		- The password for $username.

	      o $connection_string
		-Contains  the	Oracle	instance to connect to. It can be an Easy Connect string, or a Connect Name from the tnsnames.ora file, or
		the name of a local Oracle instance. If not specified, PHP uses environment variables such as TWO_TASK (on  Linux)  or	LOCAL  (on
		Windows) and ORACLE_SID to determine the Oracle instance to connect to.  To use the Easy Connect naming method, PHP must be linked
		with Oracle 10 g or greater Client libraries. The Easy Connect string for Oracle 10 g is of the  form:	[//]host_name[:port][/ser-
		vice_name].  From Oracle 11 g, the syntax is: [//]host_name[:port][/service_name][:server_type][/instance_name]. Service names can
		be found by running the Oracle utility lsnrctl status on the database server machine.  The tnsnames.ora file can be in the  Oracle
		Net  search  path, which includes $ORACLE_HOME/network/admin and /etc. Alternatively set TNS_ADMIN so that $TNS_ADMIN/tnsnames.ora
		is read. Make sure the web daemon has read access to the file.

	      o $character_set
		-Determines the character set used by the Oracle Client libraries. The character set does not need to match the character set used
		by the database. If it doesn't match, Oracle will do its best to convert data to and from the database character set. Depending on
		the character sets this may not give usable results. Conversion also adds some time overhead. If not specified, the Oracle  Client
		libraries  determine  a  character set from the NLS_LANG environment variable. Passing this parameter can reduce the time taken to
		connect.

	      o $session_mode
		-This parameter is available since version PHP 5 (PECL OCI8 1.1) and accepts the following values:  OCI_DEFAULT,  OCI_SYSOPER  and
		OCI_SYSDBA.  If  either  OCI_SYSOPER or OCI_SYSDBA were specified, this function will try to establish privileged connection using
		external credentials. Privileged connections are disabled by default. To enable them you need to  set  oci8.privileged_connect	to
		On.   PHP  5.3	(PECL  OCI8 1.3.4) introduced the OCI_CRED_EXT mode value. This tells Oracle to use External or OS authentication,
		which must be configured in the database. The OCI_CRED_EXT flag can only be used with  username  of  "/"  and  a  empty  password.
		oci8.privileged_connect may be On or Off.  OCI_CRED_EXT may be combined with the OCI_SYSOPER or OCI_SYSDBA modes.  OCI_CRED_EXT is
		not supported on Windows for security reasons.

RETURN VALUES

	Returns a connection identifier or FALSE on error.

EXAMPLES

       Example #1

	      Basic oci_pconnect(3) Example using Easy Connect syntax

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

	      ?>

	See oci_connect(3) for further examples of parameter usage.

NOTES

       Note

	       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: oci8.persistent_timeout, oci8.ping_interval and oci8.max_persistent.

SEE ALSO

       oci_connect(3), oci_new_connect(3).

PHP Documentation Group 													   OCI_PCONNECT(3)