How to grab seperated integers from long string

Question

I am working on a enrollment system for a judo club. I am using a string to store the ID\'s of people, who showed up. It looks somthing like this:

0,3,4,7,8,10,

Answer 1

use EXPLODE

$num = "0,3,4,7,8,10";
$pieces = explode(",", $num );

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