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oci_new_connect

(PHP 5, PECL oci8:1.1-1.2.4)

oci_new_connect — Establishes a new connection to the Oracle server

Descrizione

resource oci_new_connect ( string $username , string $password [, string $db [, string $charset [, int $session_mode ]]] )

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.

Elenco dei parametri

username

The Oracle user name.

password

The password for username .

db

This optional parameter can either contain the name of the local Oracle instance or the name of the entry in tnsnames.ora.

If the 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.

charset

Utilizzando Oracle server version 9.2 o successive, si può specificare il parametro charset , che verrà utilizzato nella nuova connessione. Se si utilizza Oracle server < 9.2, questo parametro verrà ignorato ed al suo posto verrà invece utilizzata la variabile d'ambiente NLS_LANG.

session_mode

This parameter 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, 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.

Valori restituiti

Returns a connection identifier or FALSE on error.

Esempi

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($stmtOCI_DEFAULT);
  echo 
$conn " inserted hallo\n\n";
}

function 
delete_data($conn)
{
  
$stmt oci_parse($conn"delete from scott.hallo");
  
oci_execute($stmtOCI_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($stmtOCI_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>";
?>

Note

Nota: If you're using PHP with Oracle Instant Client, you can use easy connect naming method described here: » https://download-west.oracle.com/docs/cd/B12037_01/network.101/b10775/naming.htm#i498306. Basically this means you can specify "//db_host[:port]/database_name" as database name. But if you want to use the old way of naming you must set either ORACLE_HOME or TNS_ADMIN.

Nota: 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.