php – 致命错误：调用未定义的函数mysqli_result()

当我试图将旧的sql切换到sqli时,有人可以告诉我为什么这不起作用：

$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");`

它一直给我一个错误：“致命错误：调用未定义的函数MysqLi_result()”

解决方法:

不要使用这种代码.这是非常低效的.使用MysqLi_fetch_assoc()代替：

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

一个SINGLE数据库操作,而不是你想要做的3个.