Question

我发现错误但代码正常运行！这是我的代码

 <?php

 require('connect.php');
 $name = $_POST['name'];
 $comment = $_POST['comment'];
 $submit = $_POST['submit'];

 if ($submit) {
     if ($name && $comment) {
         $insert = mysql_query("INSERT INTO comment (name, comment) VALUES ('$name', '$comment')");
     } else {
         echo "Please fill all fields";
     }
 }
 ?>
 <!DOCTYPE html>
 <html>
 <head>
 <meta http-equiv="Content-type" content="text/html; charset=utf-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 </head>
 <body>
 <form action="index.php" method="POST">
 <table>
 <tr><td>Name: </td><td><input type="text" name="name" /></td></tr>
 <tr><td colspan="2">Comment: </td></tr>
 <tr><td colspan="2"><textarea name="comment"></textarea></td></tr>
 <tr><td colspan="2"><input type="submit" name"submit" value="Comment"/>      </td></tr>
 </table>
 </form>

 <?php
 $getquery = mysql_query("SELECT * FROM comment ORDER BY id DESC");
 while($rows = mysql_fetch_assoc($getquery))
 {
     $id = $rows['id'];
     $name = $rows['name'];
     $comment = $rows['comment'];

     echo $name . "<br />" . $comment ;
 }
 ?>
 </body>

这是我得到的错误：

注意：未定义的索引：第4行的C：\ xampp \ htdocs \ index.php中的名称
注意：未定义的索引：第5行的C：\ xampp \ htdocs \ index.php中的注释注意：未定义的索引：在第6行的C：\ xampp \ htdocs \ index.php中提交

但我再说一遍，无论错误如何，代码都能正常运行！错误始终存在......

Answer 1

在第一次访问时，可能没有$ _POST

$name = isset($_POST['name']) ? $_POST['name'] : '';
$comment = isset($_POST['comment']) ? $_POST['comment'] : '';
$submit = isset($_POST['submit']) ? $_POST['submit'] : '';

我的PHP代码有错误

1 个答案: