diff --git a/examples/concat.php b/examples/concat.php
new file mode 100644
index 00000000..9afd33e9
--- /dev/null
+++ b/examples/concat.php
@@ -0,0 +1,7 @@
+<?php
+$a = str_repeat('A', 10);
+$b = ' = ';
+$c = ' hello ';
+$d = "\n";
+
+var_dump($a. $b. $c. $d);
diff --git a/examples/yield.php b/examples/yield.php
index 14196f2f..d3342d90 100644
--- a/examples/yield.php
+++ b/examples/yield.php
@@ -3,6 +3,8 @@
 function main()
 {
     require __DIR__ . '/fn.php';
-    var_dump(fn_test_yeild());
+    foreach (fn_test_yeild() as $value) {
+        echo $value . "\n";
+    }
 }