oci_new_connect
(PHP 5)
oci_new_connect -- Establishes a new connection to the Oracle server
Description
resource
oci_new_connect ( string username, string password [, string db [, string charset]])
oci_new_connect() creates a new connection to an Oracle
server and logs on. 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.
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.
oci_new_connect() forces the creation of a new connection.
This should be used if you need to isolate a set of transactions. By
default, connections are shared and subsequent calls to
oci_connect() will return the same connection
identifier.
The following demonstrates how you can separate connections.
例子 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.
注:
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().