Take multiple values from a multi select

Question

I need to get values from a multiselect

<select id="opcoes" name="opcoes[]" class="select" multiple="multiple" size="5" data-required required="required">
<option value="opcao1">Opção 1</option>
<option  value="opcao2">Opção 2</option>
<option  value="opcao3">Opção 3</option>

I wonder how I can take the selected values and put in a php variable.

I’ve tried with $_POST['opcoes[]'], but always returns null to me.

Answer 1

To call all selected options just do $_POST['opcoes'], select name must have brackets and attribute multiple to function properly.

<form method="post" action="#">
   <select id="opcoes" name="opcoes[]" multiple="multiple" >
      <option value="opcao1">Opção 1</option>
      <option  value="opcao2">Opção 2</option>
      <option  value="opcao3">Opção 3</option>
   </select>

   <input type="submit" />
</form>

<?php
   foreach($_POST['opcoes'] as $item){
      echo $item .'<br>';   
   }

In the production code do not forget to make a check if there are marked items, you can use the function count() to avoid sending a null in the foreach.

Answer 2

You don’t have to put [].

Working example:

HTML

 <form method="POST" action="../../model/php/teste.php" >
    <select id="opcoes" name="opcoes[]" class="select" multiple="multiple" size="5" data-required required="required">
       <option value="opcao1">Opção 1</option>
       <option  value="opcao2">Opção 2</option>
       <option  value="opcao3">Opção 3</option>
    </select>
    <button type="submit">Enviar</button>
 </form>

PHP

var_dump($_POST['opcoes']);