MongoCursor::sort

(PECL mongo >=0.9.0)

MongoCursor::sort — Sorts the results by given fields

说明

public MongoCursor MongoCursor::sort ( array $fields )

参数

fields

An array of fields by which to sort. Each element in the array has as key the field name, and as value either 1 for ascending sort, or -1 for descending sort.

Each result is first sorted on the first field in the array, then (if it exists) on the second field in the array, etc. This means that the order of the fields in the fields array is important. See also the examples section.

返回值

Returns the same cursor that this method was called on.

错误/异常

Throws MongoCursorException if this cursor has started iterating.

范例

Example #1 MongoCursor::sort() example


<?php
// Sort on field x, ascending
$cursor->sort(array('x' => 1));

// The order in the associative array is important. For instance, these two
// examples will yield different results:

// Sort on date ascending and age descending
$cursor->sort(array('date' => 1, 'age' => -1));

// Sort on age descending and date ascending
$cursor->sort(array('age' => -1, 'date' => 1));
?>

PHP手册 - N: Sorts the results by given fields

用户评论:

klgleb at gmail dot com (05-Jul-2011 07:00)

Here both arrays are equal <?php // sort date ascending and age descending $cursor->sort(array('date' => 1, 'age' => -1)); // sort age descending and date ascending $cursor->sort(array('age' => -1, 'date' => 1)); ?>