mysqli_connect不報錯，但此後操作都顯示not a valid MySQL-Link resource

$connect = mysqli_connect("host","user","password","db") or die("Error " . mysqli_error($connect));$result = mysql_query('select * from admin',$connnet);print(mysql_num_rows($result));mysql_close();

報錯：

Warning: mysql_query(): supplied argument is not a valid MySQL-Link resourceWarning: mysql_num_rows(): supplied argument is not a valid MySQL result resourceWarning: mysql_close(): no MySQL-Link resource supplied

而使用物件導向方法則沒有問題
請問這是什麼問題？

回複內容：

$connect = mysqli_connect("host","user","password","db") or die("Error " . mysqli_error($connect));$result = mysql_query('select * from admin',$connnet);print(mysql_num_rows($result));mysql_close();

報錯：

Warning: mysql_query(): supplied argument is not a valid MySQL-Link resourceWarning: mysql_num_rows(): supplied argument is not a valid MySQL result resourceWarning: mysql_close(): no MySQL-Link resource supplied

而使用物件導向方法則沒有問題
請問這是什麼問題？

因為你寫錯字母了...
第一個變數是 $connect
第二個變數是 $connnect
多了一個n，好不？
當然，也要用mysqli_query而不是mysql_query

mysql_query -> mysqli_query
mysql_num_rows -> mysqli_num_rows
mysql_close -> mysqli_close

哥們你用mysqli_connect建立的串連得用mysqli_xxx來用
mysqli_xxx和mysql_xxx是不能混用的

