<?php
    //if(!isset($_SESSION)) header("location:../board.php");
    $servername = "localhost";
    $username = "root";
    $password = "pass";
    $dbname = "chat";
    $cto=new PDO("mysql:host=$servername;dbname=$dbname",$username,$password);
    switch($_POST['why']){
        case "gclass":
            $csql=$cto->prepare("SELECT * FROM class");
            $csql->execute();
            $col=[];
            $cls=[];
            while($r=$csql->fetch()){
                $col[]=$r['color'];
                $cls[]=$r['classes'];
            }
            $return=[
                'color'=>$col,
                "class"=>$cls,
            ];
            echo json_encode($return);
            $cto=null;
            die();
        break;
    }
?>>