diff --git a/php/random_bytes.go b/php/random_bytes.go
new file mode 100644
index 0000000..7c3194f
--- /dev/null
+++ b/php/random_bytes.go
@@ -0,0 +1,10 @@
+package php
+
+import "crypto/rand"
+
+// RandomBytes — Generates cryptographically secure pseudo-random bytes
+func RandomBytes(len int) []byte {
+	b := make([]byte, len)
+	_, _ = rand.Read(b)
+	return b
+}