Chaînes de caractères

Untitled.php

<?php
$first_message = "0@sn9sirppa@#?ia'jgtvryko1";

$divide1 = strlen($first_message);
$key_divide1 = 5;
$key_divide2 = $divide1 / 2;
$first_modif = substr($first_message, $key_divide1, $key_divide2);
echo $first_modif;
$second_modif = str_replace('@#?', ' ', $first_modif);
echo $second_modif;
echo '<br>';
echo strrev($second_modif);


-j'ai appris
-toutes les ficelles
-des strings