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oci_pconnect

(PHP 5, PECL OCI8 >= 1.1.0)

oci_pconnect — Connect to an Oracle database using a persistent connection

Description resource oci_pconnect ( string $username , string $password [, string $connection_string [, string $character_set [, int $session_mode ]]] ) 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 Persistent Database Connections section for more information.

Parameters

username password connection_string» Easy Connect string, or a Connect Name from the tnsnames.ora

If not specified, PHP uses environment variables such as TWO_TASK (on Linux) or LOCAL (on Windows) and ORACLE_SID to determine the to connect to.

To use the Easy Connect naming method, PHP must be linked with Oracle 10g or greater Client libraries. The Easy Connect string for Oracle 10g is of the form: [//]host_name[:port][/service_name]. With Oracle 11g, the syntax is: [//]host_name[:port][/service_name][:server_type][/instance_name]. Service names can be found by running the Oracle utility on the database server machine.

The tnsnames.ora and /etc is read. Make sure the web daemon has read access to the file.

character_set

If not specified, the Oracle Client libraries determine a character set from the NLS_LANG environment variable.

Passing this parameter can reduce connection time.

session_modeOCI_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

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 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.

Notes

Note: Starting with PHP 5.1.2 and PECL oci8 1.1, the lifetime and maximum number of persistent Oracle connections can be tuned by setting the following configuration values: oci8.persistent_timeout, oci8.ping_interval and oci8.max_persistent.

Note: In PHP versions before 5.0.0 you must use ociplogon() instead. The old function name can still be used in current versions, however it is deprecated and not recommended.

See Also

  • oci_connect() - Connect to an Oracle database
  • oci_new_connect() - Connect to the Oracle server using a unique connection





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