Display numbers with ordinal suffix/position in PHP

I want to display numbers/any position like merit position as follows

• 1 as 1st,
• 2 as 2nd,
• 3 as 3rd
• 21 as 21st
• ...,
• 150 as 150th.

As a function:

function ordinal_position($number) {
    $ends = array('th','st','nd','rd','th','th','th','th','th','th');
    if ((($number % 100) >= 11) && (($number%100) <= 13))
        return $number. 'th';
    else
        return $number. $ends[$number % 10];
}
//Example Usage
echo ordinal_position(121);

// show 121st