Question

How to check if a number is pandigital in PHP

Answer 1

// pandigital = a number that makes use of all the digits to exactly once
// for example 15234 is 1 through 5 pandigital

function IsPandigital($num) {
    $array = str_split(strval($num));
    sort($array);
    $number1 = (int)$array[0];
    
    for ($i = 1; $i < count($array); $i++) {
        $number2 = (int)$array[$i];
        if ($number2 != $number1 + 1) {
            return false;
        }
        $number1 = $number2;
    }
    return true;
}

$num = 152634;
if (IsPandigital($num)) {
    echo "Yes\n";
}
else {
    echo "No\n";
}





/*
run:
  
Yes
  
*/

 

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