Javascript console.log() 返回 php 字符串的引用错误

Question

我试图将数组值输出到控制台，但出现未定义的错误:

错误

ReferenceError: Ciencia is not defined

代码

 $sql = "SELECT topic FROM book_list WHERE topic != '' ORDER BY topic ASC";
        $result = mysqli_query($db, $sql);
        <?php 
            while($topic = mysqli_fetch_assoc($result)){?>
                console.log(<?php echo $topic['topic']; ?>);
        <?php }?>

如果我在 mysql 控制台中输出 sql，我会得到这个

+-------------+
| topic       |
+-------------+
| Ciencia     |
| Comedia     |
| Comedia     |
| Matematicas |
| Science     |
+-------------+

谢谢!

Answer 1

似乎正在尝试使用 console.log(Ciencia) 而不是 console.log("Ciencia")。

将行更改为:

console.log("<?php echo $topic['topic']; ?>");