我收到了回复:
注意:第11行的Page1.php中未定义索引yy
注意:第12行的Page1.php中未定义的索引mm
注意:第13行的Page1.php中未定义的索引dd
如何定义这些 yy,mm,dd ?
<?php
$redirect_page= 'Page2.php';
$_SESSION['yy'] = $_POST['yy']; // this is on line 11
$_SESSION['mm'] = $_POST['mm']; // this is on line 12
$_SESSION['dd'] = $_POST['dada'];// this is on line 13
if (isset($_POST['Submit'])) {
header ('Location: '.$redirect_page);
}
?>
<HTML>
<Form name="Page1" action="" method="POST">
<select name="yy">
<option value="2001">2001</option>
// ...Another 100 years
</select>
<select name="mm">
<option value="1">1</option>
<option value="2">2</option>
// ... another 10 months
</select>
<select name="dd">
<option value="1">1</option>
<option value="2">2</option>
// ...another 29 days
</select>
<input type="Submit" name="Submit" value="Submit">
</Form>
</HTML>
答案 0 :(得分:6)
我知道人们已经回答了问题,但我会给你一点建议。使用下面的这个小功能:
function _post($Var, $Default=''){
return (isset($_POST[$Var]) === TRUE ? $_POST[$Var] : $Default);
}
如果找不到变量,您可以设置默认值。它还将处理未定义的索引错误;)
未定义的索引表示在数组中找不到该条目。在这种情况下,yy
数组中不存在条目mm
,dd
和$_POST
。您必须使用PHP语言构造命令 isset 检查它们是否存在。使用方法如下:
$_SESSION['yy'] = _post('yy', date('Y')); // will be the value of $_POST['yy'] or it not found will be the current year
$_SESSION['mm'] = _post('mm', date('M')); // ... or will be the current month (MM)
$_SESSION['dd'] = _post('dd', date('d')); // ... or will be the current day (DD)
您可以根据需要创建不同的功能:
function _get($Var, $Default=''){
return (isset($_GET[$Var]) === TRUE ? $_GET[$Var] : $Default);
}
function _session($Var, $Default=''){
return (isset($_SESSION[$Var]) === TRUE ? $_SESSION[$Var] : $Default);
}
function _put($Var, $Default=''){
return (isset($_PUT[$Var]) === TRUE ? $_PUT[$Var] : $Default);
}
function _delete($Var, $Default=''){
return (isset($_DELETE[$Var]) === TRUE ? $_DELETE[$Var] : $Default);
}
function _files($Var, $Default=NULL){
return (isset($_FILES[$Var]) === TRUE ? $_FILES[$Var] : $Default);
}
答案 1 :(得分:5)
尝试将这些帖子变量包装在isset函数
中$_SESSION['yy'] = isset($_POST['yy']) ? $_POST['yy'] : ""; // this is on line 11
$_SESSION['mm'] = isset($_POST['mm']) ? $_POST['mm'] : ""; // this is on line 12
$_SESSION['dd'] = isset($_POST['dada']) ? $_POST['dada'] : "";// this is on line 13
答案 2 :(得分:2)
您必须先启动PHP会话才能设置值:
<?php
session_start();
$redirect_page= 'Page2.php';
$_SESSION['yy'] = $_POST['yy'];
$_SESSION['mm'] = $_POST['mm'];
$_SESSION['dd'] = $_POST['dada'];
// rest of code
?>
答案 3 :(得分:1)
试
if(isset($_POST['yy']))
$_SESSION['yy'] = $_POST['yy'];
if(isset($_POST['mm']))
$_SESSION['mm'] = $_POST['mm'];
if(isset($_POST['dd']))
$_SESSION['dd'] = $_POST['dd']; // assuming it is $_POST['dd'] and not $_POST['dada']