1 files changed, 21 insertions, 0 deletions
diff --git a/src/web/helpers/html.php b/src/web/helpers/html.php
new file mode 100644
index 0000000..dc38e3a
--- /dev/null
+++ b/src/web/helpers/html.php
@@ -0,0 +1,21 @@
+<?php /* Copyright (c) 2024 Freya Murphy */
+
+function is_base64(string $data): bool {
+	return base64_encode(base64_decode($data, true)) === $data;
+}
+
+function maybe_base64_encode(string $data): string {
+	if (is_base64($data)) {
+		return $data;
+	} else {
+		return base64_encode($data);
+	}
+}
+
+function esc(string $data): string {
+	$data = trim(preg_replace('/\s\s+/', ' ', $data));
+	$data = str_replace('&', '&amp;', $data);
+	$data = str_replace('<', '&lt;', $data);
+	$data = str_replace('>', '&gt;', $data);
+	return $data;
+}