php - Select Random options from Select drop down

Question

I want to be able to select randomly from the select tag using php,

i tried using rand(),it didnt seem to work

<select name="symbols" class="form-control" multiple="multiple">
    <option value="BCH/BTC">BCH/BTC</option>
    <option value="BCH/EUR">BCH/EUR</option>
    <option value="BCH/GBP">BCH/GBP</option>
    <option value="BTC-EOS">BTC/EOS</option>

<?php 
     $symbols = mysqli_real_escape_string($conn, $_POST['symbols']);
     $rand001= shuffle($symbols); 
 ?> 
                              

question from:https://stackoverflow.com/questions/65869688/select-random-options-from-select-drop-down

Answer 1

you have to use javascript for this,

because html has been created already before and php cannot change it:

in Jquery Syntax:

let options = $("option");
let toSelect = options[Math.floor(Math.random() * options.length)];
$(toSelect).attr("selected","selected");