致命错误:调用未定义函数mysqli_result()

有人可以告诉我为什么这不起作用,当我试图切换我的旧SQL到sqli:

$query = "SELECT * FROM `product_category`"; $result = mysql_query($query, $connect) or die("could not perform query: " . mysql_error()); $num_rows = mysql_num_rows($result); for ($i=0; $i < $num_rows; $i++) { $ID = mysql_result($result,$i,"ID"); $name = mysql_result($result,$i,"name"); $description = mysql_result($result,$i,"description"); 

至:

 $query = ("SELECT * FROM `product_category`"); $result = mysqli_query($connect, $query) or die("could not perform query"); $num_rows = mysqli_num_rows($result); for ($i=0; $i < $num_rows; $i++) { $ID = mysqli_result($result, "ID"); $name = mysqli_result($result,$i,"name"); $description = mysqli_result($result,$i,"description");` 

它不断给我一个错误:“致命的错误:调用未定义的函数mysqli_result()”

不要使用这种types的代码。 这是非常低效的。 使用mysqli_fetch_assoc()来代替:

 while($row = mysqli_fetch_assoc($result)) { $id = $row['ID']; $name = $row['name']; etc.. } 

一个单一的数据库操作,而不是你正在做的3+。