How to find average from array in php?

Question

Example:

$a[] = \'56\';
$a[] = \'66\';
$a[] = \'\';
$a[] = \'58\';
$a[] = \'85\';
$a[] = \'\';
$a[] = \'\';
$a[] = \'76\';
$a[] = \'\';
$a[] = \'57\';
         


        

Answer 1

The accepted answer works for the example values, but in general simply using array_filter($a) is probably not a good idea, because it will filter out any actual zero values as well as zero length strings.

Even '0' evaluates to false, so you should use a filter that explicitly excludes zero length strings.

$a = array_filter($a, function($x) { return $x !== ''; });
$average = array_sum($a) / count($a);