全部, 我有以下类,以便检查通过HTML创建的表单是否有效,并且如果有人执行ctrl + F5等,也会阻止表单提交两次。这是执行该操作的类:
<?php
class Form_Key
{
protected $oldKey;
public function __construct()
{
// Ensure we have an available session
if ( NULL == session_id() )
{
session_start();
}
// Grab our former key for validation
if ( isset( $_SESSION['form_key'] ) )
{
$this->oldKey = $_SESSION['form_key'];
}
// Assign the new key
$_SESSION['form_key'] = md5( uniqid( mt_rand(), TRUE ) );
}
public function isValid()
{
return 'POST' == $_SERVER['REQUEST_METHOD']
&& isset( $_POST['form_key'] )
&& '' != trim( $_POST['form_key'] )
&& '' != trim( $this->oldKey )
&& $_POST['form_key'] === $this->oldKey;
}
public function getKey()
{
return $_SESSION['form_key'];
}
public function getOldKey()
{
return $this->oldKey;
}
public function render()
{
return '<input type="hidden" name="form_key" value="' . $_SESSION['form_key'] . '" />';
}
public function __toString()
{
return $this->render();
}
}
?>
然后我有一个看起来像这样的表格:
require "form_key.php";
$form_key = new Form_Key;
<form action="about.php" method="post" name="create_memory" id="create_memory">
<input type="text" value="" id="lamecaptcha" name="lamecaptcha" />
<input type="text" value="" id="person_name" name="person_name" />
<?php echo $form_key; ?>
</form>
在验证方面(save_memory.php)我做了类似这样的事情:
require "form_key.php";
$form_key = new Form_Key;
if(isset($_POST) && $form_key->isValid()){
echo "It is ok to submit";
}else{
echo "Something went wrong";
}
如果我不通过ajax提交表单,所有这一切都很有效,但如果我通过AJAX提交表单,它总会给我一些错误的错误。以下是我通过AJAX提交表单的方式:
person_name = $("input#person_name").val();
memory = $("input#memory").val();
form_key = $("input#form_key").val();
var html_memory = $.ajax({
type: "POST",
url: "save_memory.php",
data: "person_name=" + person_name + "&memory=" + memory + "&form_key=" + form_key,
async: false
}).responseText;
alert(html_memory);
任何想法为什么会这样,我怎样才能通过AJAX提交表单?非常感谢你提前!
答案 0 :(得分:1)
键输入的Jquery选择器无效。您必须将form_key的ID放入其中,如下所示:
return '<input id="form_key" type="hidden" name="form_key" value="' . $_SESSION['form_key'] . '" />';
[编辑]
此外,您还必须调用生成输入的函数:
<?php echo $form_key->render(); ?>