Rumah > Artikel > pembangunan bahagian belakang > mysqli_connect不报错,但此后操作都显示not a valid MySQL-Link resource
<code>$connect = mysqli_connect("host","user","password","db") or die("Error " . mysqli_error($connect)); $result = mysql_query('select * from admin',$connnet); print(mysql_num_rows($result)); mysql_close(); </code>
报错:
<code>Warning: mysql_query(): supplied argument is not a valid MySQL-Link resource Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource Warning: mysql_close(): no MySQL-Link resource supplied </code>
而使用面向对象方法则没有问题
请问这是什么问题?
<code>$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(); </code>
报错:
<code>Warning: mysql_query(): supplied argument is not a valid MySQL-Link resource Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource Warning: mysql_close(): no MySQL-Link resource supplied </code>
而使用面向对象方法则没有问题
请问这是什么问题?
因为你写错字母了...
第一个变量是 $connect
第二个变量是 $connnect
多了一个n,好不?
当然,也要用mysqli_query而不是mysql_query
mysql_query -> mysqli_query
mysql_num_rows -> mysqli_num_rows
mysql_close -> mysqli_close
哥们你用mysqli_connect创建的连接得用mysqli_xxx来用
mysqli_xxx和mysql_xxx是不能混用的