printf和sprintf的應用

c: %c 
d: %d f: %f', 80,80, 80, 80);  echo '
';  printf('%0.2f 
%+d 
%0.2f 
', 8, 8, 1235.456);    printf('the cost of %d %s at $%0.2f each is $%0.2f.', 4, 'brooms', 8.50, (4*8.50));    echo '
';  $tax = 30;  printf('The tax rate is %0.2f%%', $tax);

Sprint可以把查詢和資料很好的分開代碼

                Sorting Multidimensional Arrays       1])) {          $parent_id = $_POST['parent_id'];      }        $q = sprintf("INSERT INTO tasks (parent_id, task) VALUES (%d, '%s')", $parent_id, mysqli_real_escape_string($db, strip_tags($_POST['task'])));      $r = mysqli_query($db, $q);        if(mysqli_affected_rows($db) == 1) {          echo '
任務添加成功
';      } else {          echo '
任務添加失敗
';      }  }  ?>           $y['parent_id']);      }      usort($tasks, 'parent_sort');      echo '
當前的工作清單
 

  ';      foreach ($tasks as $task) {          echo "
  
{$task['task']}
\n";      }  echo '
 
';  ?>    

