Mongodb - Fetch distinct values from a collection using PHP

Question

How to fetch and display only the distinct values of a key for all elements using PHP. In my application I am already fetching data using the below code and assigning that data to an array which will be further used in JS.

<?php
require 'C:\ProgramData\ComposerSetup\bin\vendor\autoload.php'; // include Composer's autoloader

$client = new MongoDB\Client("mongodb://localhost:27017");
$collection = $client->test->bf;
$clubSelectList = array();

$clubSelectListResult = $collection->find();

foreach ($clubSelectListResult as $option) {
    echo $option['club'], "<br><br>";
}

?>

How can I fetch unique values. Any help is appreciated. Thanks.

Update: This does it.

$clubSelectListResult = $collection->distinct('club');

foreach ($clubSelectListResult as $option) {
    echo $option, "<br><br>";
}

Answer 1

您必须调用distinct方法：

$collection->distinct('your_distinct_field');