Explode to array and print each element as list item

Question

I have a set of numbers in a table field in database, the numbers are separated by comma ','. I am trying to do the following:

Step 1. : SELECT set of numbers from database and explode it to array :

$array =  explode(',', $set_of_numbers);

Step 2. : Print each element of the array as list item by using foreach loop :

foreach ($array as $list_item => $set_of_numbers){
    echo "<li>";
    print_r(array_list_items($set_of_numbers));
    echo "</li>";}

Please anybody tell me what is wrong. Thank you.

Answer 1

$numbers = '1,2,3';

$array =  explode(',', $numbers);

foreach ($array as $item) {
    echo "<li>$item</li>";
}

Answer 2

Assuming your original $set_of_numbers is simply a CSV string, something like 1,2,3,4,..., then your foreach is "mostly" ok. But your variable naming is quite bonkers, and your print-r() call uncesary:

$array = explode(',', $set_of_numbers);
foreach($array as $key => $value) {
   echo "<li>$key: $value</li>";
}

Assuming that 1,2,3,4... string, you'd get

<li>0: 1</li>
<li>1: 2</li>
<li>2: 3</li>
etc...