$string = "$4.9/inch";
$res = filter_var($string, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
echo $res;
It will print4.9
$string = "$4.9/inch";
$res = filter_var($string, FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION);
echo $res;
It will print4.9