On: PHP in 2019

[guggle]

How ?

    ~ php --version
  PHP 7.2.17-0ubuntu0.19.04.1 (cli) (built: Apr 18 2019 18:01:25) ( NTS )
  Copyright (c) 1997-2018 The PHP Group
  Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
      with Zend OPcache v7.2.17-0ubuntu0.19.04.1, Copyright (c) 1999-2018, by Zend Technologies
    ~ cat test.php
  <?php

  echo strlen("ùé");
  echo "\n";
  echo mb_strlen("ùé");
  echo "\n";
    ~ php test.php 
  4
  2

[CiPHPerCoder → guggle]

The answer is: Composer + Packagist. There's almost certainly a library that handles it in a sane and transparent manner for you so you don't have to deal with the pain.