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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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