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

Rounding up, not accounting for any abbreviations above 'k' or thousands, showing one decimal place.

function numToKs($number) {
    if ($number >= 1000) {
        return number_format(($number / 1000), 1) . 'k';
    } else {
        return $number;
    }
}

numToKs(1)          = 1
numToKs(111)        = 111
numToKs(999)        = 999
numToKs(1000)       = "1.0k"
numToKs(1499)       = "1.5k"
numToKs(1500)       = "1.5k"
numToKs(1501)       = "1.5k"
numToKs(1550)       = "1.6k"
numToKs(11501)      = "11.5k"
numToKs(1000000000) = "1,000,000.0k"
numToKs(1234567890) = "1,234,567.9k"