使用后未定义索引
问题描述:
我收到$ _POST变量未定义的索引错误。 I.E. $ _ POST [ '主机']。我知道有点为什么我得到他们,但有没有办法让PHP和窗体保持在同一个文件中,而不是得到这些错误?使用后未定义索引
<html>
<head>
<title>Install Forum</title>
</head>
<body>
<h1>Please enter your database information</h1>
<form action='install.php' method='post'>
Hostname: <input type='text' name='hostname'><br/>
MySQL User: <input type='text' name='dbuser'><br/>
MySQL Pass: <input type='password' name='dbpassword'><br/>
<input type='submit' name='submit' value='Submit'><br/>
</body>
</html>
<?php
include_once("config.php");
$date = date('Y-m-d');
//Database Variables
$dbhost = strip_tags($_POST['hostname']);
$dbuser = strip_tags($_POST['dbuser']);
$dbpass = strip_tags($_POST['dbpassword']);
$submit = isset($_POST['submit']);
答
裹在if
你的PHP代码与isset
条件。这样,代码只会如果表单已提交运行:
if(isset($_POST['submit']))
{
include_once("config.php");
$date = date('Y-m-d');
//Database Variables
$dbhost = strip_tags($_POST['hostname']);
$dbuser = strip_tags($_POST['dbuser']);
$dbpass = strip_tags($_POST['dbpassword']);
$submit = isset($_POST['submit']);
}
[PHP:“通知:未定义变量”和“通知:未定义指数”]的可能重复(http://*.com/questions/4261133/php-notice-undefined-variable-and-notice-undefined-index) – Jocelyn