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

Calculate the Sum of Digits in a Number String in PHP

In PHP, you can easily determine the sum of all the digits in a numeric string. This can be particularly useful for tasks like calculating checksums or analyzing numerical data.

To perform this operation, you can utilize the following technique:

<code class="php">array_sum(str_split($number));</code>

This method entails converting the numeric string to an array of individual digits using the str_split() function. Subsequently, we utilize array_sum() to calculate the sum of these digits, effectively providing the total.

It's important to note that this approach assumes the number is positive (or, more precisely, that converting $number to a string produces only digits). Otherwise, you may need to consider additional handling for negative numbers or non-numeric characters.

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