Write a PHP program to compute the sum of the digits of a number


Introduction

PHP is a server scripting language, and It is a powerful tool for making interactive and dynamic Web-pages. I have used WampServer 2.2 for following excercise..


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  1. <?php
  2. function sum_of_digits($nums) {
  3. $digits_sum = 0;
  4. for ($i = 0; $i < strlen($nums); $i++) {
  5. $digits_sum += $nums[$i];
  6. }
  7. return $digits_sum;
  8. }
  9. echo sum_of_digits("123456789")."<br>";
  10. echo sum_of_digits("999999")."<br>";
  11. ?>

Result

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