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# The previous video does not sufficiently cover the topic to pose this question.

It would help to cover the topic more in depth before posing a confusing challenge.

palindromic_primes.php
```<?php

function mimic_array_sum(\$array){

foreach(\$array as \$element){

}

}

\$palindromic_primes = array(11, 757, 16361);

?>
```

Hi Remik,

Could you please explain what is confusing you in this challenge?

I see you already created part of the function. Now you need to add: A variable that will contain the total, The logic to calculate the total, Return the total

```function mimic_array_sum(\$array){

\$total = 0;
foreach(\$array as \$element){
\$total = \$total + \$element;

}
return \$total
}
```

I am lost with the question on creating a function that adds the total of each of the integers in the array and how to apply the function.

I do not understand how the \$element is able to return total of the 3 integers. I understand the \$total variable setting to 0, and calling it again but after that I am lost.

The \$element returns the value of each element inside of the array. We then add it to the current total.

Suppose we have an array with 3 values (23, 28, 35).

We pass this array to the mimic_array_sum function. The foreach loop runs through all the elements in the array, one at the time.

first iteration:

\$total = 0, \$element = 23, \$total = 0 + 23

second iteration:

\$total = 23, \$element = 28, \$total = 23 + 28

third and final iteration

\$total = 51 \$element = 35 \$total = 51 + 35

the foreach loop finishes because you reached the end of the array, you now return the \$total value which is 86.

ah now I get it -thanks