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'; 

Actually how to find average value from this array excluding empty. please help to resolve this problem.

Answer 1

first you need to remove empty values, otherwise average will be not accurate.

so

$a = array_filter($a); $average = array_sum($a)/count($a); echo $average; 

DEMO

More concise and recommended way

$a = array_filter($a); if(count($a)) {     echo $average = array_sum($a)/count($a); } 

See here