mysqli_result不能转换在

Question

我想一个SQL COUNT的结果存储在一个变量，然后divise他们为int，但是我正在呈现的错误：

Notice: Object of class mysqli_result could not be converted to int in ----

$countrows = 'SELECT count(*) AS NumRows FROM time_slots'; 
$countresult = $db->query($countrows); 

$something = $countresult/3 ; 
echo $something; 

我用echo在测试时显示结果... 我该如何解决这个问题？

Answer 1

你需要首先得到结果，并在数学后存储在变量中。

countrows = 'SELECT count(*) AS NumRows FROM time_slots'; 
$countresult = $db->query($countrows); 
$count = $countresult->fetch_assoc();    
$something = $count['NumRows']/3 ; 
echo $something;