session數據存取的方法可通過session.serialize_handler方法來判斷，反序列化可通過下面的unserialize方法，參考http://stackoverflow.com/questions/27813619/unserializing-php-session-data-from-db-table
public static function unserialize($session_data) {
$method = ini_get("session.serialize_handler");
switch ($method) {
case "php":
return self::unserialize_php($session_data);
break;
case "php_binary":
return self::unserialize_phpbinary($session_data);
break;
default:
throw new Exception("Unsupported session.serialize_handler: " . $method . ". Supported: php, php_binary");
}
}

private static function unserialize_php($session_data) {
$return_data = array();
$offset = 0;
while ($offset < strlen($session_data)) {
if (!strstr(substr($session_data, $offset), "|")) {
throw new Exception("invalid data, remaining: " . substr($session_data, $offset));
}
$pos = strpos($session_data, "|", $offset);
$num = $pos - $offset;
$varname = substr($session_data, $offset, $num);
$offset += $num + 1;
$data = unserialize(substr($session_data, $offset));
$return_data[$varname] = $data;
$offset += strlen(serialize($data));
}
return $return_data;
}

private static function unserialize_phpbinary($session_data) {
$return_data = array();
$offset = 0;
while ($offset < strlen($session_data)) {
$num = ord($session_data[$offset]);
$offset += 1;
$varname = substr($session_data, $offset, $num);
$offset += $num;
$data = unserialize(substr($session_data, $offset));
$return_data[$varname] = $data;
$offset += strlen(serialize($data));
}
return $return_data;
}

轉載于:https://www.cnblogs.com/xuxiang/p/5320178.html

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