dbx_sort

(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5, PECL dbx:1.1.0)

dbx_sort — Sort a result from a dbx_query by a custom sort function

说明

bool dbx_sort ( object $result , string $user_compare_function )

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

参数

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.

返回值

如果成功则返回 TRUE，失败则返回 FALSE。

范例

Example#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);
?>

注释

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

参见

dbx_compare()


	PHP5中文手册 dbx Direct IO dbx PHP Manual dbx_sort (PHP 4 >= 4.0.6, PHP 5 <= 5.0.5, PECL dbx:1.1.0) dbx_sort — Sort a result from a dbx_query by a custom sort function 说明 bool dbx_sort ( object `$result` , string `$user_compare_function` ) Sort a result from a dbx_query() call with a custom sort function. 参数 `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. 返回值如果成功则返回 `TRUE`，失败则返回 `FALSE`。范例 Example#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); ?> 注释 Note: It is always better to use ORDER BY SQL clause instead of dbx_sort() if possible. 参见 dbx_compare() dbx Direct IO dbx PHP Manual