dbx_sort

Руководство по PHP
Пред.		След.

Описание

bool dbx_sort ( object result, string user_compare_function )

Sort a result from a dbx_query() call with a custom sort function.

Список параметров

result: A result set returned by dbx_query().
user_compare_function: The user-defined comparison function. It must accept two arguments and return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

Возвращаемые значения

Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.

Примеры

Пример 1. dbx_sort() example


<?php
function user_re_order($a, $b) 
{
    $rv = dbx_compare($a, $b, "parentid", DBX_CMP_DESC);
    if (!$rv) {
        $rv = dbx_compare($a, $b, "id", DBX_CMP_NUMBER);
    }
    return $rv;
}

$link   = dbx_connect(DBX_ODBC, "", "db", "username", "password")
    or die("Could not connect");

$result = dbx_query($link, "SELECT id, parentid, description FROM tbl ORDER BY id");
    // data in $result is now ordered by id

dbx_sort($result, "user_re_order");
    // data in $result is now ordered by parentid (descending), then by id

dbx_close($link);
?>

Примечания

Замечание: It is always better to use ORDER BY SQL clause instead of dbx_sort() if possible.

Смотрите также

dbx_compare()

Пред.	Начало	След.
dbx_query	Уровень выше	Direct IO Functions