PHP Count round thousand to a K style count like facebook Share . . . Twitter Button ect

Question

Ok so I am trying to turn my hit counter to round thousands to a single digit too display 3 thousand hits as 3K for example, like the Facebook Share and Twitter Tweet Button

Answer 1

My func

function numsize($size,$round=2){
    $unit=['', 'K', 'M', 'B', 'T'];
    return round($size/pow(1000,($i=floor(log($size,1000)))),$round).$unit[$i];
}