PHP program to check if all digits of a number divide it

To check if all digits of a number divide it in PHP, we extract each digit and verify if it divides the original number without remainder. Zero digits are handled separately since division by zero is undefined.

Example

Here's a complete program to check if all digits of a number divide it −

<?php
function divisibility_check($my_val, $my_digit)
{
    return ($my_digit != 0 && $my_val % $my_digit == 0);
}

function divide_digits($my_val)
{
    $temp = $my_val;
    while ($temp > 0)
    {
        $my_digit = $temp % 10;
        if (!(divisibility_check($my_val, $my_digit)))
            return false;
        $temp = intval($temp / 10);
    }
    return true;
}

$val = 128;
if (divide_digits($val))
    echo "All digits divide the number $val";
else
    echo "Not all digits divide the number $val";
?>

All digits divide the number 128

How It Works

The divisibility_check() function verifies two conditions: the digit is not zero (to avoid division by zero) and the original number is completely divisible by the digit. The divide_digits() function extracts each digit using modulo operation and checks divisibility for each digit.

Testing Different Numbers

<?php
function divisibility_check($my_val, $my_digit)
{
    return ($my_digit != 0 && $my_val % $my_digit == 0);
}

function divide_digits($my_val)
{
    $temp = $my_val;
    while ($temp > 0)
    {
        $my_digit = $temp % 10;
        if (!(divisibility_check($my_val, $my_digit)))
            return false;
        $temp = intval($temp / 10);
    }
    return true;
}

$numbers = [128, 102, 36, 24];
foreach($numbers as $num) {
    if (divide_digits($num))
        echo "$num: All digits divide the number<br>";
    else
        echo "$num: Not all digits divide the number<br>";
}
?>

128: All digits divide the number
102: Not all digits divide the number
36: All digits divide the number
24: All digits divide the number

Conclusion

This algorithm efficiently checks digit divisibility by extracting each digit and testing if it divides the original number. It properly handles zero digits by skipping division by zero checks.