(PHP 4, PHP 5, PHP 7, PHP 8)

odbc_pconnectÖffnet eine persistente Datenbankverbindung


    string $dsn,
    string $user,
    string $password,
    int $cursor_option = SQL_CUR_USE_DRIVER
): resource|false

Öffnet eine persistente Datenbankverbindung.

Diese Funktion ist odbc_connect() sehr ähnlich. Der einzige Unterschied besteht darin, dass die Verbindung nach dem Ende des Skriptes erhalten bleibt. Folgende Verbindungen mit gleicher dsn, user und password-Kombination (über odbc_connect() und odbc_pconnect()) können dann die bestehende Verbindung weiterbenutzen.


Details können der odbc_connect()-Dokumentation entnommen werden.


Gibt eine ODBC-Verbindungskennung zurück. Bei einem Fehler wird false zurückgegeben..


Hinweis: Persistente Verbindungen wirken nicht, wenn PHP als CGI-Programm verwendet wird.

Siehe auch

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User Contributed Notes 4 notes

etsai at email dot com
24 years ago
The following constants are defined for cursortype:

With some ODBC drivers, executing a complex stored procedure may fail with an error similar to: "Cannot open a cursor on a stored procedure that has anything other than a single select statement in it". Using SQL_CUR_USE_ODBC may avoid that error. Also, some drivers don't support the optional row_number parameter in odbc_fetch_row(). SQL_CUR_USE_ODBC might help in that case, too.
wls at wwco dot com
23 years ago
I found that using odbc_close($odbchandle) on a connection opened by odbc_pconnect() causes a warning "not a valid ODBC-Link resource". So you can't just change odbc_connect() to odbc_pconnect() and expect things to work without warning messages. However, you can use odbc_close_all() and not get a warning.
j_schrab at execpc dot com
23 years ago
Ok, learning time. As I was told by the PHP-DevTeam...

Multiple connections are supported, but when you try to connect with exactly the same parameters, an existing
connection will be reused, leading to the behaviour you see.

You can simply omit the calls to odbc_close() since
connections get closed on script termination anyway or better:
Consider making your connection id a global variable or pass
it to your functions.
alberici at to dot infn dot it
22 years ago
I saw that closing an ODBC persistent connection opened with odbc_pconnect() with odbc_close() doesnt work. Someone here have proposed using odbc_close_all() but wouldnt that close all persistent connections (also others ones !!!) ? What about catching a persistent handle with odbc_connect() and then closing the connection with odbc_close() ? If there are no available handles (for some reason the last pconn has been closed) this approach opens and close a normal single-script connection. Waiting comments...
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