Create Sentence Break in PHP

Create below function in PHP page
 
function myTruncate2($string, $limit, $break=" ", $pad="")

{

     // return with no change if string is shorter than $limit

     if(strlen($string) <= $limit) return $string;

     $string = substr($string, 0, $limit);

     if(false !== ($breakpoint = strrpos($string, $break))) {

                $string = substr($string, 0, $breakpoint);

      }

     return $string . $pad; 
 }

Call to function as below :

$str_add1 = $this->myTruncate2($data->ahli_coalamat, 48);