1<?php
  2/*
  3 This file should only ever be loaded on PHP 7+
  4 */
  5if (PHP_VERSION_ID < 70000) {
  6    return;
  7}
  8
  9spl_autoload_register(function ($class) {
 10    $namespace = 'ParagonIE_Sodium_';
 11    // Does the class use the namespace prefix?
 12    $len = strlen($namespace);
 13    if (strncmp($namespace, $class, $len) !== 0) {
 14        // no, move to the next registered autoloader
 15        return false;
 16    }
 17
 18    // Get the relative class name
 19    $relative_class = substr($class, $len);
 20
 21    // Replace the namespace prefix with the base directory, replace namespace
 22    // separators with directory separators in the relative class name, append
 23    // with .php
 24    $file = dirname(__FILE__) . '/src/' . str_replace('_', '/', $relative_class) . '.php';
 25    // if the file exists, require it
 26    if (file_exists($file)) {
 27        require_once $file;
 28        return true;
 29    }
 30    return false;
 31});
 32