Smarty v5 update test, initial code setup

src/Compile/Modifier/UnescapeModifierCompiler.php

@@ -0,0 +1,34 @@
+<?php
+namespace Smarty\Compile\Modifier;
+
+/**
+ * Smarty unescape modifier plugin
+ * Type:     modifier
+ * Name:     unescape
+ * Purpose:  unescape html entities
+ *
+ * @author Rodney Rehm
+ */
+
+class UnescapeModifierCompiler extends Base {
+
+	public function compile($params, \Smarty\Compiler\Template $compiler) {
+		$esc_type = $this->literal_compiler_param($params, 1, 'html');
+
+		if (!isset($params[ 2 ])) {
+			$params[ 2 ] = '\'' . addslashes(\Smarty\Smarty::$_CHARSET) . '\'';
+		}
+
+		switch ($esc_type) {
+			case 'entity':
+			case 'htmlall':
+				return 'html_entity_decode(mb_convert_encoding(' . $params[ 0 ] . ', ' . $params[ 2 ] . ', \'UTF-8\'), ENT_QUOTES | ENT_SUBSTITUTE | ENT_HTML401, ' . $params[ 2 ] . ')';
+			case 'html':
+				return 'htmlspecialchars_decode(' . $params[ 0 ] . ', ENT_QUOTES)';
+			case 'url':
+				return 'rawurldecode(' . $params[ 0 ] . ')';
+			default:
+				return $params[ 0 ];
+		}
+	}
+}