How to sum array using function in PHP - php

Question

I got exercise to do.
Need to create a function called sumArray() that should take an array as argument and return the sum of all items in the array. Answer with a call to the function using the array: [4,256,5,13,1].Write your code below and put the answer into the variable ANSWER.
So long I came but it doesn't work.
function sumArray($array) {
$total = 0;
foreach ($array as $value) {
$total += $value;
}
return $array;
}
$ANSWER = sumArray(4, 256, 5, 13, 1);

Answer 1

So close. Just 2 things to do.
function sumArray($array) {
$total = 0;
foreach ($array as $value) {
$total += $value;
}
//YOU NEED TO RETURN $total !! not $array
return $total;
}
//the params given to sumArray() are not an array. just encapsule that in [] like:
$ANSWER = sumArray([4, 256, 5, 13, 1]);

Answer 2

First of all you need to return $total, you are again returning your array.
Second, you must need to pass array in function argument as:
$sumArray = array(4, 256, 5, 13, 1); // your array
$myAnswer = sumArray($sumArray); // calling function
Example:
<?php
function sumArray($array) {
$total = 0;
foreach ($array as $value) {
$total += $value;
}
return $total;
}
/** Your array **/
$sumArray = array(4, 256, 5, 13, 1);
/** Calling function **/
$myAnswer = sumArray($sumArray);
/** Your result **/
echo $myAnswer; //279 result
?>

Answer 3

You can just use PHP's built in array_sum method.
http://php.net/manual/en/function.array-sum.php
$ANSWER = array_sum(array(4, 256, 5, 13, 1));
If you must create a function then wrap it.
function sumArray($array) {
return array_sum($array);
}
$ANSWER = sumArray(array(4, 256, 5, 13, 1));
Note. In your example you haven't provided an array you have various arguments. You could also do that like so:
function sumArray() {
return array_sum(func_get_args());
}
$ANSWER = sumArray(4, 256, 5, 13, 1);
Edit. As this answer got down voted for not providing an example on how to add it up here it is. Though you should always use the built in function if it's a available and teaching you to avoid it is counterintuitive.
function sumArray($array) {
for($i = 0, $total = 0; $i < count($array); $total+=$array[$i++]);
return $total;
}
$ANSWER = sumArray([4, 256, 5, 13, 1]);

Answer 4

Since you need to write a function, your code should look like this:
function sumArray($array) {
$total = 0;
foreach ($array as $value) {
$total += $value;
}
return $total;
}
$ANSWER = sumArray(array(4, 256, 5, 13, 1));
Your code isn't working because you're not passing an array to the function, and you're also returning the parameter and not the $total variable.
Alternatively, you can use array_sum inside a function of your own.