php中http与https跨域共享session的解决方法

$currentSessionID = session_id();
session_id($currentSessionID );

<?php
session_start(); 
$currentSessionID = session_id(); 
$_SESSION['testvariable'] = 'Session worked'; 
$secureServerDomain = '.jb51.'; 
$securePagePath = '/safePages/securePage.php' 
echo '<a href="https://' . $secureServerDomain . $securePagePath . '?session="' . $currentSessionID . '">点这里跳转到HTTPS 协议</a>';
?>

<?php
$currentSessionID = $_GET['session'];
session_id($currentSessionID);
session_start();
if (!emptyempty($_SESSION['testvariable'])) {
      echo $_SESSION['testvariable'];
} else { 
      echo 'Session did not work.';
}
?>