将PHP会话从一页传递到另一页

Question

to be more relevant, i edit my question accordingly, i got ReqData.php and SendData.php where the first has input for id in a form using post the purpose of my code is to send the id from ReqData to SendData and decrypt the encrypted id which is done is ReqData using following code

function public_encrypt($plaintext){
$fp=fopen("mykey.pub","r");
$pub_key=fread($fp,8192);
fclose($fp);
openssl_get_publickey($pub_key);
openssl_public_encrypt($plaintext,$crypttext, $pub_key );
return(base64_encode($crypttext));
}


$_SESSION['caesar'] = public_encrypt($_POST["inc"]);

and then go to SendData to be decrypted using

function private_decrypt($encryptedext){
$fp=fopen("mykey.pem","r");
$priv_key=fread($fp,8192);
fclose($fp);
$private_key = openssl_get_privatekey($priv_key);
openssl_private_decrypt(base64_decode($encryptedext), $decrypted, $private_key);
return $decrypted; 
}

$encryp = $_SESSION['caesar'];
echo $encryp."<br/>";
$demo = private_decrypt($encryp);
echo "<br/>";
echo $demo;  

my problem is it can detect the session but it's not decrypting, for ur info, i'm using rsa encryption

update: i var_dump($demo), it give me string(0) "", it supposed to be value i type in the id input box

Answer 1

You need this

page1.php

<?php
session_start();

page2.php

<?php
session_start();