| 
<?php
 spl_autoload_register(function ($class) {
 $namespace = 'ParagonIE_Sodium_';
 // Does the class use the namespace prefix?
 $len = strlen($namespace);
 if (strncmp($namespace, $class, $len) !== 0) {
 // no, move to the next registered autoloader
 return false;
 }
 
 // Get the relative class name
 $relative_class = substr($class, $len);
 
 // Replace the namespace prefix with the base directory, replace namespace
 // separators with directory separators in the relative class name, append
 // with .php
 $file = dirname(__FILE__) . '/src/' . str_replace('_', '/', $relative_class) . '.php';
 // if the file exists, require it
 if (file_exists($file)) {
 require_once $file;
 return true;
 }
 return false;
 });
 
 /* Explicitly, always load the Compat class: */
 if (!class_exists('ParagonIE_Sodium_Compat', false)) {
 require_once dirname(__FILE__) . '/src/Compat.php';
 }
 
 if (!class_exists('SodiumException', false)) {
 require_once dirname(__FILE__) . '/src/SodiumException.php';
 }
 
 require_once dirname(__FILE__) . '/lib/namespaced.php';
 if (!defined('SODIUM_CRYPTO_AEAD_AEGIS128L_KEYBYTES')) {
 require_once dirname(__FILE__) . '/lib/php84compat_const.php';
 }
 
 if (!extension_loaded('sodium')) {
 if (!defined('SODIUM_CRYPTO_SCALARMULT_BYTES')) {
 require_once dirname(__FILE__) . '/lib/php72compat_const.php';
 }
 assert(class_exists('ParagonIE_Sodium_Compat'), 'Possible filesystem/autoloader bug?');
 require_once(dirname(__FILE__) . '/lib/php72compat.php');
 } elseif (!function_exists('sodium_crypto_stream_xchacha20_xor')) {
 // Older versions of {PHP, ext/sodium} will not define these
 require_once(dirname(__FILE__) . '/lib/php72compat.php');
 }
 if (PHP_VERSION_ID < 80400 || !extension_loaded('sodium')) {
 require_once dirname(__FILE__) . '/lib/php84compat.php';
 }
 require_once(dirname(__FILE__) . '/lib/stream-xchacha20.php');
 require_once(dirname(__FILE__) . '/lib/ristretto255.php');
 
 |