如何在php echo中执行mysql查询？ [重复]

Question

这个问题在这里已有答案：

What is the difference between client-side and server-side programming? 5个答案

我想在php echo子句中执行mysql查询..请帮忙..

mysqli_query($mysqli2,$update_book); ----> does not work.

这是我的代码..

$mysqli2=mysqli_connect("localhost","root","","bookDB");

$update_book="UPDATE bookinfo SET Status ='No' WHERE BookName='Step by Step'";


 echo "<script language=javascript>
   var con_test = confirm('Are you ready?');
   if(con_test == true){
     mysqli_query($mysqli2,$update_book);
     alert('Complete.');
   }
   else if(con_test == false){
     alert('Canceled.');
   }
   </script>";