Exploding a string twice

Question

I have a string composed like this:

87||1|nuovo#88||4|#209|||#89|||#41||1|#5|||#3||1|116#20|||#13||3|#148|||

The pattern is:

Answer 1

Try following code

    $str = "87||1|nuovo#88||4|#209|||#89|||#41||1|#5|||#3||1|116#20|||#13||3|#148|||#36|||91#29|||68";
$caratteristica = explode("#",$str);

foreach ($caratteristica as $value) {
 list($id[], $mq[], $qr[], $tipo[]) = explode('|', $value);
}

// For check the result
echo "
";
print_r($id);

print_r($mq);

print_r($qr);

print_r($tipo);


I got following answer

    Array
(
    [0] => 87
    [1] => 88
    [2] => 209
    [3] => 89
    [4] => 41
    [5] => 5
    [6] => 3
    [7] => 20
    [8] => 13
    [9] => 148
    [10] => 36
    [11] => 29
)
Array
(
    [0] => 
    [1] => 
    [2] => 
    [3] => 
    [4] => 
    [5] => 
    [6] => 
    [7] => 
    [8] => 
    [9] => 
    [10] => 
    [11] => 
)
Array
(
    [0] => 1
    [1] => 4
    [2] => 
    [3] => 
    [4] => 1
    [5] => 
    [6] => 1
    [7] => 
    [8] => 3
    [9] => 
    [10] => 
    [11] => 
)
Array
(
    [0] => nuovo
    [1] => 
    [2] => 
    [3] => 
    [4] => 
    [5] => 
    [6] => 116
    [7] => 
    [8] => 
    [9] => 
    [10] => 91
    [11] => 68
)