first commit

system/helper/utf8.php

@@ -0,0 +1,27 @@
+<?php
+namespace Opencart\System\Helper\Utf8;
+mb_internal_encoding('UTF-8');
+
+function strlen(string $string) {
+	return mb_strlen($string);
+}
+
+function strpos(string $string, string $needle, int $offset = 0) {
+	return mb_strpos($string, $needle, $offset);
+}
+
+function strrpos(string $string, string $needle, int $offset = 0) {
+	return mb_strrpos($string, $needle, $offset);
+}
+
+function substr(string $string, int $offset, ?int $length = null) {
+	return mb_substr($string, $offset, $length);
+}
+
+function strtoupper(string $string) {
+	return mb_strtoupper($string);
+}
+
+function strtolower(string $string) {
+	return mb_strtolower($string);
+}