用php更新sql数据库

Question

I'm really pulling my hair out with this one. I'm trying to update my articles table.

My SELECT statement works fine

  $result = mysql_query("SELECT * FROM articles") or die(mysql_error());

But my UPDATE statemnt fails, while not throwing any mysql errors.

$sql = "UPDATE articles SET kudos = 10 WHERE id = 1" ;
$query = mysqli_query($sql)or die(mysql_error());

Any and all help is appreciated!

EDIT: I'm determining it failed with this if statement

if($query) {
        echo 'it worked';
    } else {
        echo 'it failed';
    }

Answer 1

在第一个例子中你正在使用mysql_query而在第二个例子中你正在使用mysqli_query ，你应该使用哪一个？

Answer 2

Your SELECT statement works with:

$result = mysql_query("SELECT * FROM articles") or die(mysql_error());

and you're mixing both mysqli_* and mysql_* functions in:

(which you can't do because they are not compatible together)

$query = mysqli_query($sql)or die(mysql_error());
      has i --^

and since your successful SELECT works with mysql_* functions, then use:

$query = mysql_query($sql)or die(mysql_error());
      no i --^

However, you're better off using full mysqli_* functions in its entirety, since mysql_* functions are deprecated and will be removed from future releases.