Referencing An Array Of Numbers

[Brett2KC]

Hello

 

I am stuck on a problem and I need some help. Basically I need to write a function that takes a reference to an array of numbers, loops over the array and returns the sum of those numbers. I don't exactly understand that or how to do it. Can someone give me a snippet on how it works?

[Christian F.]

The PHP manual for foreach () should give you all the information you need, the rest is pure logic and basic PHP syntax.

[ManiacDan]

Is this homework, or can you just use the built in function that already does this?

[Brett2KC]

Well I need to write the function out, and thats what i dont get. It's not homework, it's just a practice booklet that I am learning on.

[Jessica]

The PHP manual for foreach () should give you all the information you need, the rest is pure logic and basic PHP syntax.

 

If you're trying to learn, and we do it for you, what will you learn?

 

If you get stuck we can help but you haven't shown any code yet.

 

And this sounds like homework.

Edited October 15, 2012 by Jessica

[ManiacDan]

Accepting a variable "by reference" means putting an ampersand in front of the variable in the function declaration:

function myFunction( &$myVariable )

 

That's a little-used feature which means any changes to $myVariable inside of myFunction() affect the state of the variable OUTSIDE the function, like this:

function upper( &$myVariable ) {
 $myVariable = strtopupper($myVariable);
}
$a = "abc";
upper($a);
echo $a; //prints ABC

 

Foreach is easy, you have the manual for that.

 

Return is also easy, that should be in your book.

[Barand]

See array_sum