PHP Program to Count Digits of a Number

<?php

$numStr1 = '110010';
$digitCount1 = strlen($numStr1);
echo "String Length: " . $digitCount1;

$number = 12345;
$numStr2 = (string)$number;
$digitCount2 = strlen($numStr2);
echo "\nString Length: " . $digitCount2;

?>

<?php

function countDigits($number) {
    $digitCount = 0;
    while ($number != 0) {
        $number = (int)($number / 10);
        $digitCount++;
    }
    return $digitCount;
}

$numStr = '110010';
$digitCount1 = countDigits($numStr);
echo "String Length: " . $digitCount1;

$number = 12345;
$digitCount2 = countDigits($number);
echo "\nString Length: " . $digitCount2;

?>

<?php

function countDigits($number) {
    $digits = str_split($number);
    $digitCount = count($digits);
    return $digitCount;
}

$numStr = '110010';
$digitCount1 = countDigits($numStr);
echo "String Length: " . $digitCount1;

$number = 12345;
$digitCount2 = countDigits((string)$number);
echo "\nString Length: " . $digitCount2;

?>