How to Calculate the Sum of Digits in a Numeric String in PHP?

Getting the Sum of Digits in a Numeric String in PHP

PHP offers convenient methods for manipulating numeric strings and retrieving their digit sums.

Question:

How can we determine the sum of all digits in a numeric string in PHP?

Answer:

PHP provides a straightforward way to achieve this task using the array_sum() and str_split() functions. Here's an example:

<code class="php">$number = '12345'; // Numeric string

$digits = str_split($number); // Convert to an array of digits
$sum = array_sum($digits); // Get the sum of digits

echo "Sum of digits: $sum"; // Display the result</code>

This method assumes that the number is positive (or that the conversion of $number to a string generates only digits). If the number contains non-digit characters, the outcome may be inaccurate.

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