<?php
/*
* php简单利用token防止表单重复提交
* 此处理方法纯粹是为了给初学者参考
*/
session_start();
function set_token() {
$_session['token'] = md5(microtime(true));
}
function valid_token() {
$return = $_request['token'] === $_session['token'] ? true : false;
set_token();
return $return;
}
//如果token为空则生成一个token
if(!isset($_session['token']) || $_session['token']=='') {
set_token();
}
if(isset($_post['test'])){
if(!valid_token()){
echo "token error";
}else{
echo '成功提交，value:'.$_post['test'];
}
}
?>
<form method="post" action="">
<input type="hidden" name="token" value="<?php echo $_session['token']?>">
<input type="text" name="test" value="default">
<input type="submit" value="提交" />
</form>