$keyword = '10'; // 0 1.1 1
if(preg_match("/^[1-9][0-9]*$/",$keyword)){
  echo "是正整數！"; 
  exit();
}

if ((floor($jp_total) - $jp_total) !==0){
  echo "不是正整數";
}else{
  echo "是正整數";
}

if(!is_numeric($jp_total)||strpos($jp_total,".")!==false){
  echo "不是整數";
}else{
  echo "是整數";
}