diff --git a/php/src/ext/utils.php b/php/src/ext/utils.php
new file mode 100644
index 0000000..7fc16d3
--- /dev/null
+++ b/php/src/ext/utils.php
@@ -0,0 +1,12 @@
+<?php
+namespace nulib\ext;
+
+class utils {
+  /** générateur d'UUIDv4 "du pauvre" */
+  static final function uuidgen(): string {
+    $data = random_bytes(16);
+    $data[6] = chr(ord($data[6]) & 0x0f | 0x40); // set version to 0100
+    $data[8] = chr(ord($data[8]) & 0x3f | 0x80); // set bits 6-7 to 10
+    return vsprintf("%s%s-%s-%s-%s-%s%s%s", str_split(bin2hex($data), 4));
+  }
+}