對(duì)于每個(gè)方面，它是一個(gè)“鍵值”配對(duì)陣列，因此我們可以以傳統(tǒng)的方式迭代。

<span>namespace classFacet
</span><span>{
</span>    <span>use Pinq<span>\ITraversable</span>,
</span>        Pinq\Traversable<span>;
</span>
    <span>class Facet
</span>    <span>{
</span>
        <span>public $data; // Original data
</span>        <span>public $key; // the field to be grouped on
</span>        <span>public $type; // F: full string; S: start of a string; R: range;
</span>        <span>public $range; // Only valid if $type is not F
</span>
		<span>...
</span>
        <span>public function getFacet()
</span>        <span>{
</span>            <span>$filter = '';
</span>
            <span>if ($this->type == 'F') // Full string 
</span>            <span>{
</span>				<span>...
</span>            <span>}
</span>            <span>elseif ($this->type == "S") //Start of string
</span>            <span>{
</span>				<span>...
</span>            <span>}
</span>            <span>elseif ($this->type == "R") // A value range
</span>            <span>{
</span>                <span>$filter = $this->data
</span>                        <span>->groupBy(function($row)
</span>                        <span>{
</span>                            <span>return floor($row[$this->key] / $this->range) * $this->range;
</span>                        <span>})
</span>                        <span>->select(function (ITraversable $data)
</span>                <span>{
</span>                    <span>return ['key' => $data->last()[$this->key], 'count' => $data->count()];
</span>                <span>});
</span>            <span>}
</span>
            <span>return $filter;
</span>        <span>}
</span>    <span>}
</span><span>}</span>

（第一個(gè)顯示初始輸入頁(yè)面，第二個(gè)顯示了一個(gè)面積的結(jié)果，價(jià)格在$ 0到$ 10并由作者訂購(gòu)） 好的，到目前為止，我們已經(jīng)設(shè)法模仿了我們的Web應(yīng)用程序中的一個(gè)面搜索功能！
在我們結(jié)束本系列之前，我們將對(duì)此演示進(jìn)行最終研究，看看可以做些改進(jìn)的演示以及局限性是什么。

改進(jìn)要進(jìn)行

>

在我們的index.php中查看代碼，我們將看到這也意味著以下代碼行：

每次顯示應(yīng)用程序中的一個(gè)頁(yè)面時(shí)，都會(huì)被調(diào)用，這意味著每次都執(zhí)行以下行：

<span>$app->get('demo2', function () use ($app)
</span><span>{
</span>    <span>global $demo;
</span>    <span>$test2 = new pinqDemo<span>\Demo</span>($app);
</span>    <span>return $test2->test2($app, $demo->test1($app));
</span><span>}
</span><span>);
</span>
<span>$app->get('demo2/facet/{key}/{value}', function ($key, $value) use ($app)
</span><span>{
</span>    <span>global $demo;
</span>    <span>$test3 = new pinqDemo<span>\Demo</span>($app);
</span>    <span>return $test3->test3($app, $demo->test1($app), $key, $value);
</span><span>}
</span><span>);</span>

>如果我們避免使用框架會(huì)更好嗎？好吧，除了在沒(méi)有框架的情況下開(kāi)發(fā)應(yīng)用程序并不是一個(gè)好主意，我們?nèi)匀幻媾R同樣的問(wèn)題：數(shù)據(jù)（和狀態(tài)）并不是一個(gè)HTTP呼叫對(duì)另一個(gè)http呼叫的持續(xù)性。這是HTTP的基本特征。使用緩存引擎應(yīng)該避免這種情況。

<span>namespace classFacet
</span><span>{
</span>    <span>use Pinq<span>\ITraversable</span>,
</span>        Pinq\Traversable<span>;
</span>
    <span>class Facet
</span>    <span>{
</span>
        <span>public $data; // Original data
</span>        <span>public $key; // the field to be grouped on
</span>        <span>public $type; // F: full string; S: start of a string; R: range;
</span>        <span>public $range; // Only valid if $type is not F
</span>
		<span>...
</span>
        <span>public function getFacet()
</span>        <span>{
</span>            <span>$filter = '';
</span>
            <span>if ($this->type == 'F') // Full string 
</span>            <span>{
</span>				<span>...
</span>            <span>}
</span>            <span>elseif ($this->type == "S") //Start of string
</span>            <span>{
</span>				<span>...
</span>            <span>}
</span>            <span>elseif ($this->type == "R") // A value range
</span>            <span>{
</span>                <span>$filter = $this->data
</span>                        <span>->groupBy(function($row)
</span>                        <span>{
</span>                            <span>return floor($row[$this->key] / $this->range) * $this->range;
</span>                        <span>})
</span>                        <span>->select(function (ITraversable $data)
</span>                <span>{
</span>                    <span>return ['key' => $data->last()[$this->key], 'count' => $data->count()];
</span>                <span>});
</span>            <span>}
</span>
            <span>return $filter;
</span>        <span>}
</span>    <span>}
</span><span>}</span>

> PINQ的作者現(xiàn)在正在研究下一個(gè)主要版本版本（版本3）。我確實(shí)希望它能變得更強(qiáng)大。

隨時(shí)在下面留下您的評(píng)論和想法！

>常見(jiàn)問(wèn)題（常見(jiàn)問(wèn)題解答）有關(guān)PINQ和FACETED SEARCH

什么是PINQ，與片段搜索有何關(guān)系？

PINQ是PHP庫(kù)，它提供了一種獨(dú)特，直觀且功能強(qiáng)大的查詢(xún)語(yǔ)言來(lái)操縱數(shù)組和其他數(shù)據(jù)集。它旨在簡(jiǎn)化查詢(xún)和操縱數(shù)據(jù)的過(guò)程。關(guān)于刻面搜索，PINQ可用于創(chuàng)建可以根據(jù)多個(gè)標(biāo)準(zhǔn)過(guò)濾和排序數(shù)據(jù)的復(fù)雜查詢(xún)，這是FaceTed搜索的核心概念。

PINQ的架構(gòu)搜索方法與其他方法有何不同？