/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 15-1-5
 * Time: 下午4:01
 */
 
function countspace($string)
{  $num = 0;
    for ($i=0;$i<strlen($string);$i++){
        if($string[$i] == " " ||$string[$i] == "　"){
            $num ++;
        }
    }
    return $num;
}
echo countspace("懒 人 程 序"); //output 3;