用PHP实现MongoDB查询中的订单

使用php时，如何在MongoDB查询中排序

$regexObj = new MongoRegex('/'.$str.'/i');

$search = array('title'  => $regexObj);

$cursor = $this->collection->find($search);

我在MongoDB中有一个字段作为表，其中包含行：

//first
[title] => Great Musuem
[table] => arts

//second    
[title] => Musuem
[table] => people

//third     
[title] => Garden
[table] => arts

//4th   
[title] => Garden
[table] => music

etc ...

我应该如何使用一张表格按照人们先来，然后是艺术，然后是音乐的顺序进行排序

例如：

[title] => Musuem
[table] => people

[title] => Great Musuem
[table] => arts

[title] => Garden
[table] => arts

[title] => Garden
[table] => music

---

您必须在客户端进行排序，因为MongoDB没有非线性排序功能。PHP中的一个简单usort（）将为您完成以下任务：

<?php
function sortSpecial($a, $b)
{
    $orders = array( 'people' => 1, 'arts' => 2, 'music' => 3 );
    if ($orders[$a['table']] > $orders[$b['table']]) {
        return 1;
    }
    if ($orders[$a['table']] < $orders[$b['table']]) {
        return -1;
    }
    return strcmp($a['title'], $b['title']);
}

// your results, just for this example:
$results = array(
    array('title' => 'Great Museum', 'table' => 'arts'),
    array('title' => 'Museum',       'table' => 'people'),
    array('title' => 'Garden',       'table' => 'arts'),
    array('title' => 'gaarden',      'table' => 'music'),
);

// sort and display, this also sorts titles in the correct alphabetical order
usort( $results, 'sortSpecial' );
var_dump( $results );
?>

我试图避免循环和正常的php排序，以提高性能。但若这个特性不存在，那个么我不得不回到php排序。谢谢你的回答……是的，你必须在客户机上这样做！