PHP: Register a callback function to be called when events are posted

Description

resource ibase_set_event_handler ( callback $event_handler , string $event_name1 [, string $event_name2 [, string $... ]] )

resource ibase_set_event_handler ( resource $connection , callback $event_handler , string $event_name1 [, string $event_name2 [, string $... ]] )

This function registers a PHP user function as event handler for the specified events.

Parameters

event_handler

The callback is called with the event name and the link resource as arguments whenever one of the specified events is posted by the database.

The callback must return FALSE if the event handler should be canceled. Any other return value is ignored. This function accepts up to 15 event arguments.

event_name1

An event name.

event_name2

...

Return Values

The return value is an event resource. This resource can be used to free the event handler using ibase_free_event_handler().

Examples

Example #1 ibase_set_event_handler() example


<?php



function event_handler($event_name, $link)

{

    if ($event_name == "NEW ORDER") {

        // process new order

        ibase_query($link, "UPDATE orders SET status='handled'");

    } else if ($event_name == "DB_SHUTDOWN") {

        // free event handler

        return false;

    }

}



ibase_set_event_handler($link, "event_handler", "NEW_ORDER", "DB_SHUTDOWN");

?>

ibase_set_event_handler

Description

Parameters

Return Values

Examples

See Also