php $_GET['page'] 未定义索引
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Undefined index with $_GET['page']
提问by user1128882
browser - Notice: Undefined index: page in C:\xampp\htdocs\index.php on line 78
浏览器 - 注意：未定义索引：第 78 行 C:\xampp\htdocs\index.php 中的页面
78 line - switch($_GET['page']){
78线- switch($_GET['page']){
all code
所有代码
<?php
switch($_GET['page']){
case 1:
include_once('/p/fizika.php');
break;
case 2:
include_once('/p/geom.php');
break;
case 3:
include_once('/p/algebra.php');
break;
case 4:
include_once('/p/kalk.php');
break;
default:
include_once('/p/home.php');
break;
}
?>
回答by Shakti Singh
This Notice thrown when you try to use an array index which does not exists. The $_GET['page']is not set.
当您尝试使用不存在的数组索引时抛出此通知。在$_GET['page']未设置。
You should check if the variable index is exists using isset()
您应该使用isset()检查变量索引是否存在
if(isset($_GET['page']))
{
switch($_GET['page']){
case 1:
include_once('/p/fizika.php');
break;
...
...
}
This is now Notice free.
这现在是免费通知。
回答by Prof83
$_GET['page']is not set
$_GET['page']未设置
$_GETrefers to the params in the url
$_GET指的是url中的参数
so $_GET['page']is referring to file.php?page=123
所以$_GET['page']是指file.php?page=123
回答by Rajat Singhal
This means that the $_GET['page']variable is not set...
这意味着$_GET['page']未设置变量...
So you should add ?page=1in the url or either set the get variable form where the request for the page s getting generated
因此，您应该添加?page=1url 或设置 get 变量表单，其中生成页面请求
Or if you want to execute without it is being set
或者如果你想在没有设置的情况下执行
Apply
申请
if(isset($_GET['page']))
{
//Logic
}
