<?php
 
error_reporting(-1);
 
$code = ['a' => '1','b' => '2','c' => '3','d' => '4','e' => '5','f' => '6','g' => '7','h' => '8','i' => '9','j' => '10','k' => '11','l' => '12','m' => '13','n' => '14','o' => '15','p' => '16','q' => '17','r' => '18','s' => '19','t' => '20','u' => '21','v' => '22','w' => '23','x' => '24','y' => '25','z' => '26'];
 
$text = 'we are betrayed, switch the line';
$cipher = strtr($text, $code);
$numbers = array_flip($code);
$decode = strtr($cipher, $numbers);
 
echo "Original: {$text} <br>\nEnigma: {$cipher}<br>\n";
echo  "Decode: {$decode}";

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