Data commit

Task/Substitution-cipher/PHP/substitution-cipher.php

@@ -0,0 +1,19 @@
+<?php
+
+$alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+$key      = 'cPYJpjsBlaOEwRbVZIhQnHDWxMXiCtUToLkFrzdAGymKvgNufeSq';
+
+// Encode input.txt, and save result in output.txt
+file_put_contents('output.txt', strtr(file_get_contents('input.txt'), $alphabet, $key));
+
+$source  = file_get_contents('input.txt');
+$encoded = file_get_contents('output.txt');
+$decoded = strtr($encoded, $key, $alphabet);
+
+echo
+    '== SOURCE ==', PHP_EOL,
+    $source, PHP_EOL, PHP_EOL,
+    '== ENCODED ==', PHP_EOL,
+    $encoded, PHP_EOL, PHP_EOL,
+    '== DECODED ==', PHP_EOL,
+    $decoded, PHP_EOL, PHP_EOL;