Refactored TDF processing PHP code to confirm to new TDF format

build/scripts/Targets/TargetDescriptionFiles/Services/StringService.php

@@ -0,0 +1,23 @@
+<?php
+namespace Targets\TargetDescriptionFiles\Services;
+
+class StringService
+{
+    public function tryStringToInt(?string $value): ?int
+    {
+        if ($value === null || strlen($value) === 0) {
+            return null;
+        }
+
+        return stristr($value, '0x') !== false ? (int) hexdec($value) : (int) $value;
+    }
+
+    public function tryIntToHex(?int $value, int $pad = 0): string
+    {
+        if ($value === null) {
+            return '';
+        }
+
+        return '0x' . str_pad(strtoupper(dechex($value)), $pad, '0', STR_PAD_LEFT);
+    }
+}