PHP - Adding up an array of numbers? - php

Question

I have a PHP script that returns an array of numbers:
$fh = fopen ("./files/".$file, r);
$filedata= explode('|', fgets($fh));
echo $filedata[5];
result:
0.23387718200684
3.6163940429688
0.030826568603516
Is there a way to get the script to return results added up as just one number?

Answer 1

echo array_sum($filedata);
I think that should do the trick.
Take a look here for further information. array_sum just sums up all the values in an array.
EDIT
The above example would work if your array was a flat array of integers, decimals etc. The following is how you would sum up a 2 dimensional array where the value you want to sum is at index position 5:
var $sum = 0;
foreach($filedata as $dataElement) {
$sum += $dataElement[5];
}
echo $sum;
The above code assume that $filedata is an array of array's, each array in filedata has a value at index 5 that can be summed up... Is that more along the lines of what you need?

Answer 2

You could use array_sum:
echo array_sum($filedata);
Not working?
As might be your case $filedata[5] actually contains a string with newlines and numbers. In this case you need some extra code. Important is the line endings - these can be different depending on your operating system / file.
$sum = 0;
$sLineEnding = "\r\n";
foreach($filedata as $data)
{
$parts = explode($sLineEnding, $data);
$sum += array_sum($parts);
}
echo $sum;

Answer 3

As I see in your code, you are executing it in command line and you do echo $filedata[5] an you get different lines, this is because you are not paying attention to '\n' character, so what you need is to change that character somehow...
there are different ways... In this example I'm changing the "\n" for " " simple space
$fh = fopen ("./files/".$file, r);
$filedata= explode('|', fgets($fh));
// if "\n" is not working try '\n'
// One way
echo str_replace(" ","\n",$filedata[5]);
// Another way
echo implode(" ", explode("\n", $filedata[5]));