PHP. Руководство по PHP. 2005

ocilogon

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ocilogon

(PHP 3 >= 3.0.4, PHP 4, PHP 5)ocilogon -- Establishes a connection to Oracle

Description

resource ocilogon (string username, string password [, string db [, string charset]])

ocilogon() returns an connection identifier

needed for most other OCI calls. The optional third parameter

can either contain the name of the local Oracle instance or the

name of the entry in tnsnames.ora to which you want to connect.

If the optional third parameter is not specified, PHP uses the

environment variables ORACLE_SID (Oracle instance) or TWO_TASK

(tnsnames.ora) to determine which database to connect to.

Используя сервер Oracle версии 9.2 и выше, вы можете

указать параметр charset, который будет использован в

новом подключении. Если вы используете сервер Oracle версии < 9.2, этот параметр будет

проигнорирован и вместо него будет использована переменная окружения NLS_LANG.

Connections are shared at the page level when using

ocilogon(). This means that commits and

rollbacks apply to all open transactions in the page, even if you

have created multiple connections.

This example demonstrates how the connections are shared.

Пример 1. ocilogon() example


<?php
echo "<pre>";
$db = "";

$c1 = ocilogon("scott", "tiger", $db);
$c2 = ocilogon("scott", "tiger", $db);

function create_table($conn)
{
$stmt = ociparse($conn, "create table scott.hallo (test varchar2(64))");
ociexecute($stmt);
echo $conn . " created table\n\n";
}

function drop_table($conn)
{
$stmt = ociparse($conn, "drop table scott.hallo");
ociexecute($stmt);
echo $conn . " dropped table\n\n";
}

function insert_data($conn)
{
$stmt = ociparse($conn, "insert into scott.hallo
values('$conn' || ' ' || to_char(sysdate,'DD-MON-YY HH24:MI:SS'))");
ociexecute($stmt, OCI_DEFAULT);
echo $conn . " inserted hallo\n\n";
}

function delete_data($conn)
{
$stmt = ociparse($conn, "delete from scott.hallo");
ociexecute($stmt, OCI_DEFAULT);
echo $conn . " deleted hallo\n\n";
}

function commit($conn)
{
ocicommit($conn);
echo $conn . " committed\n\n";
}

function rollback($conn)
{
ocirollback($conn);
echo $conn . " rollback\n\n";
}

function select_data($conn)
{
$stmt = ociparse($conn, "select * from scott.hallo");
ociexecute($stmt, OCI_DEFAULT);
echo $conn."----selecting\n\n";
while (ocifetch($stmt)){
echo $conn . " [" . ociresult($stmt, "TEST"). "]\n\n";
}
echo $conn . "----done\n\n";
}

create_table($c1);
insert_data($c1); // Insert a row using c1
insert_data($c2); // Insert a row using c2

select_data($c1); // Results of both inserts are returned
select_data($c2);

rollback($c1); // Rollback using c1

select_data($c1); // Both inserts have been rolled back
select_data($c2);

insert_data($c2); // Insert a row using c2
commit($c2); // Commit using c2

select_data($c1); // Result of c2 insert is returned

delete_data($c1); // Delete all rows in table using c1
select_data($c1); // No rows returned
select_data($c2); // No rows returned
commit($c1); // Commit using c1

select_data($c1); // No rows returned
select_data($c2); // No rows returned

drop_table($c1);
echo "</pre>";
?>

Замечание:

This function was renamed to oci_connect()

after PHP >= 5.0.0. For downward compatibility

ocilogon() can also be used.

This is deprecated, however.

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