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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.

Wenn Sie den Oracle Server in der Version 9.2 oder höher benutzen, können Sie den Zeichensatz, der für eine neue Verbindung genutzt werden soll, mit dem charset Parameter angeben. Verwenden Sie Oracle in einer Version < 9.2 wird dieser Parameter ignoriert und stattdessen die Umgebungsvariable NLS_LANG benutzt.

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.

Beispiel 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>";
?>

oci_new_connect() returns FALSE on error.

Anmerkung: 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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