Add makefile, PSR-4 ModifierCompilers

src/Compile/Modifier/StrlenModifierCompiler.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Smarty\Compile\Modifier;
+/**
+ * Smarty strlen modifier plugin
+ * Type:     modifier
+ * Name:     strlen
+ * Purpose:  return the length of the given string
+ *
+ * @link   https://www.smarty.net/docs/en/language.modifier.strlen.tpl strlen (Smarty online manual)
+ */
+
+class StrlenModifierCompiler extends Base {
+
+	public function compile($params, \Smarty\Compiler\Template $compiler) {
+		return 'strlen((string) ' . $params[0] . ')';
+	}
+
+}