(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)
oci_pconnect — Connect to an Oracle database using a persistent connection
$username
,$password
,$connection_string
= null
,$encoding
= "",$session_mode
= OCI_DEFAULT
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 FPM process). See the OCI8 Connection Handling and Connection Pooling section for more information.
username
The Oracle user name.
password
The password for username
.
connection_string
Bağlanılacak Oracle nesnesi
ni içerir. Ya » Easy Connect dizgesi, veya tnsnames.ora dosyasındaki Connect Name ya da yerel Oracle nesnesi olabilir.
Belirtilmezse ya da null
verilirse, PHP bağlanacağı Oracle nesnesi
ni saptamak için TWO_TASK
(Linux) veya LOCAL
(Windows) ve ORACLE_SID
gibi ortam değişkenlerini kullanır.
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 [//]host_name[:port][/service_name]. From Oracle 11g, the syntax is: [//]host_name[:port][/service_name][:server_type][/instance_name]. Futher options were introduced with Oracle 19c, including timeout and keep-alive settings. Refer to Oracle documentation. Service names can be found by running the Oracle utility lsnrctl status
on the database servermachine.
The tnsnames.ora file can be in the Oracle Net search path, which includes /your/path/to/instantclient/network/admin, $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.
encoding
Oracle sunucusunun 9.2 ve üstü sürümlerini kullanırken, karakter_kümesi
bağımsız değişkenini yeni bağlantıda kullanılacak bağımsız değişkene göre belirtebilirsiniz. Eğer 9.2 sürümünden daha eski bir Oracle sunucusu kullanıyorsanız bu bağımsız değişken yok sayılacak, yerine NLS_LANG
ortam değişkeni kullanılacaktır.
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.
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.
Returns a connection identifier or false
on error.
Örnek 1 Basic oci_pconnect() 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($stid);
echo "<table border='1'>\n";
while ($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) : " ") . "</td>\n";
}
echo "</tr>\n";
}
echo "</table>\n";
?>
See oci_connect() for further examples of parameter usage.
Bilginize: 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.