I have a pre-defined numbering, for example from 1 to 4.
Now I need it to show the numbers that are not being used, which would be:
Números não usados: 2,4
I started the code like this:
<?php
$numeros_sorteio="1,2,3,4";
$numeros_usados="1,3";
echo "numeros livres: 2,4";
?>
Could someone give me an orientation on how to continue?
The ideal is to convert these two strings into two arrays with explode() , so you can get the difference (the elements of $todos that are not in $disponiveis ) with the function array_diff()
$todos = explode(',', '1,2,3,4');
$usados = explode(',','1,3');
$disponiveis = array_diff($todos, $usados);
echo 'Números disponiveis: '. implode(',', $disponiveis);