Register a callback function to be called when events are posted

Описание

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.

Список параметров

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

At most 15 events allowed.

Возвращаемые значения

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

Примеры

Пример #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");
?>

Смотрите также

ibase_free_event_handler() - Cancels a registered event handler
ibase_wait_event() - Wait for an event to be posted by the database