php

<?php
    include 'connection.php';

    function get_tags($conn){
        $sql = mysqli_query("SELECT distinct(tag) FROM tags");
        if(mysqli_num_rows($sql)) {
            $data = array();
            while($row=mysqli_fetch_array($sql)) {
                $data[] = array (
                    'tag' => $row['tag']);

            }
        }
        header('Content-type: application/json');
        echo json_encode($data);
    }
?>