Description
resource
oci_new_connect ( string username, string password [, string db [, string charset [, int session_mode]]] )
oci_new_connect() establishes a new connection to
an Oracle server and logs on. Unlike oci_connect() and
oci_pconnect(), oci_new_connect()
does not cache connections and will always return a brand-new freshly
opened connection handle. This is useful if your application needs
transactional isolation between two sets of queries.
The optional third parameter can either contain the name
of the local Oracle instance or the name of the entry in
tnsnames.ora. If the third parameter is not specified,
PHP uses environment variables ORACLE_SID and
TWO_TASK to determine the name of local Oracle
instance and location of tnsnames.ora accordingly.
Parameter session_mode is available since version
1.1 and accepts the following values: OCI_DEFAULT,
OCI_SYSOPER and OCI_SYSDBA.
If either OCI_SYSOPER or
OCI_SYSDBA were specified,
oci_new_connect() 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.
Using Oracle server version 9.2 and greater, you can
indicate charset parameter, which will be used in the new
connection. If you're using Oracle server < 9.2, this parameter will be ignored
and NLS_LANG environment variable will be used instead.
The following demonstrates how you can separate connections.
Example 1. oci_new_connect() example
<?php
echo "<html><pre>";
$db = "";
$c1 = oci_connect("scott", "tiger", $db);
$c2 = oci_new_connect("scott", "tiger", $db);
function create_table($conn)
{
$stmt = oci_parse($conn, "create table scott.hallo (test
varchar2(64))");
oci_execute($stmt);
echo $conn . " created table\n\n";
}
function drop_table($conn)
{
$stmt = oci_parse($conn, "drop table scott.hallo");
oci_execute($stmt);
echo $conn . " dropped table\n\n";
}
function insert_data($conn)
{
$stmt = oci_parse($conn, "insert into scott.hallo
values('$conn' || ' ' || to_char(sysdate,'DD-MON-YY HH24:MI:SS'))");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . " inserted hallo\n\n";
}
function delete_data($conn)
{
$stmt = oci_parse($conn, "delete from scott.hallo");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . " deleted hallo\n\n";
}
function commit($conn)
{
oci_commit($conn);
echo $conn . " committed\n\n";
}
function rollback($conn)
{
oci_rollback($conn);
echo $conn . " rollback\n\n";
}
function select_data($conn)
{
$stmt = oci_parse($conn, "select * from scott.hallo");
oci_execute($stmt, OCI_DEFAULT);
echo $conn . "----selecting\n\n";
while (oci_fetch($stmt)) {
echo $conn . " <" . oci_result($stmt, "TEST") . ">\n\n";
}
echo $conn . "----done\n\n";
}
create_table($c1);
insert_data($c1);
select_data($c1);
select_data($c2);
rollback($c1);
select_data($c1);
select_data($c2);
insert_data($c2);
commit($c2);
select_data($c1);
delete_data($c1);
select_data($c1);
select_data($c2);
commit($c1);
select_data($c1);
select_data($c2);
drop_table($c1);
echo "</pre></html>";
?>
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oci_new_connect() returns FALSE on error.
Note:
In PHP versions before 5.0.0 you must use ocinlogon() instead.
This name still can be used, it was left as alias of
oci_new_connect() for downwards compatability.
This, however, is deprecated and not recommended.
See also oci_connect() and
oci_pconnect().
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