Question

所以我制作了一个ScoreBoard系统，但每当我的添加/更新代码块运行时，它都会获取一个解析错误：语法错误，持有mysqli_query（）的行上的意外T_VARIABLE;如果它失败了就行，这是我的代码。

<form method="post" action="">
<center>
<font color="green">Your name Max length is 15</font>
<input type="text" name="username" maxlength="15">
<input type="submit" name="submit" value="Submit">
</center>
</form>
<font color='red'><center>
<?php
 if (isset($_POST['username']))
{
$link =  mysqli_connect("host","user","pass","db") or die("Error " . mysqli_error($link));
// $getname = $_POST['username'];
$getname = mysqli_real_escape_string($link,$_POST['username']);
$percentage = "10";
$querycheck = ("SELECT * from scoreboard where name = $getname")
$result = mysqli_query($link, $querycheck);
if (mysql_num_rows($querycheck) > 0)
    {
    $queryexist = ("UPDATE scoreboard set percentage = 20 where name = $getname");
    $resultexist = mysqli_query($link, $queryexist);
    echo "<center><font color='green' size='2'>Your score has been updated successfuly</font></center>";
    }
else
    {
    $querydoesnt = ("INSERT INTO scoreboard (name,percent) VALUES ('$getname',$percentage)");
    echo "<center><font color='green' size='2'>Your name has been added to the scoreboard successfuly </font></center>!";
    }
?>
</font></center>

它给我一个错误，显然我的mysqli_query行有问题，但第一个错误。

Answer 1

我想你忘记了那行上的分号

$querycheck = ("SELECT * from scoreboard where name = $getname");
                                                                ^
                                                               HERE

Answer 2

$querycheck = ("SELECT * from scoreboard where name = $getname") ;

忘了加分号

Answer 3

您忘记添加分号;，但忘记结束if statement

$querycheck = ("SELECT * from scoreboard where name = $getname");
                                                              ^^^^

每个PHP语句都以分号（;）结尾。 PHP不会停止读取语句，直到它达到分号。如果在行的末尾省略分号，PHP将继续阅读该语句。它将两行作为一个语句读取，因此它会报错，例如Parse error: parse error in ...

// if statement block

<font color='red'><center>
<?php
    if (isset($_POST['username']))
    {
        // your code
    }
</font></center>

注意

您正在使用mysqli_语句，因此您需要将mysql_num_rows()更改为mysqli_num_rows()

if (mysqli_num_rows($querycheck) > 0) { // your code }

PHP + SQL记分板问题

3 个答案: