Made things functional, decrypt still doesn't work

decryptFunc.php

@@ -0,0 +1,30 @@
+<?php
+  require "enc.php";
+  $data = $_POST["words"];
+  
+  //Get the key
+  $key = $_POST["key"];
+  echo "key is $key <br>";
+  
+  
+  //Get the IV
+  preg_match('#(?<=(<iv>))(.*?)(<\/iv>)#', $data, $ivArr);
+  $iv = $ivArr[0];
+  $iv = substr($iv, 0, strlen("</content>"));
+  echo "iv is $iv <br>";
+  
+  //Get the tag
+  preg_match('#(?<=(<tag>))(.*?)(<\/tag>)#', $data, $tagArr);
+  $tag = bin2hex($tagArr[0]);
+  $tag = substr($tag, 0, strlen("</tag>"));
+  echo "tag is $tag <br>";
+  
+  //Get the ciphertext
+  preg_match('#(?<=(<content>))(.*?)(<\/content>)#', $data, $ctArr);
+  $ciphertext = $ctArr[0];
+  $ciphertext = substr($ciphertext, 0, strlen("</content>"));
+  echo "text is $ciphertext <br>";
+  
+  $content = decrypt($ciphertext, $key, $iv, $tag);
+  echo "content is:<br>"; var_dump($content);
+?>