diff --git a/bad.php b/bad.php
new file mode 100644
index 0000000..0c02339
--- /dev/null
+++ b/bad.php
@@ -0,0 +1,40 @@
+<?php
+
+class BadDesign
+{
+    // No class doc comment — cleancode
+
+    public function messyFunction($a, $b)
+    {
+        // No function doc comment — cleancode
+
+        $unused = 123; // unused variable — cleancode
+
+        // Long method with nested loops — codesize + design
+        $sum = 0;
+        for ($i = 0; $i < 10; $i++) {
+            for ($j = 0; $j < 10; $j++) {
+                $sum += $i * $j;
+            }
+        }
+
+        // Excessive method complexity — design
+        if ($a > 10) {
+            if ($b < 5) {
+                for ($k = 0; $k < 5; $k++) {
+                    $sum += $k;
+                }
+            } else {
+                while ($b > 0) {
+                    $sum -= $b;
+                    $b--;
+                }
+            }
+        }
+
+        return $sum;
+    }
+}
+
+$obj = new BadDesign();
+echo $obj->messyFunction(15, 3);