diff --git a/projects/taint_test1/taint_test1.php b/projects/taint_test1/taint_test1.php
deleted file mode 100644
index a1772aa..0000000
--- a/projects/taint_test1/taint_test1.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-$ip = $_GET["ip"];
-$version = $_GET["version"];
-if ($version == 4)
-    $command = "ping ".$ip;
-else
-    $command = "ping6 ".$ip;
-shell_exec("$command -c 4");
diff --git a/projects/taint_test2/taint_test2.php b/projects/taint_test2/taint_test2.php
deleted file mode 100644
index 482af53..0000000
--- a/projects/taint_test2/taint_test2.php
+++ /dev/null
@@ -1,17 +0,0 @@
-<?php
-
-function form_body($name)
-{
-    return $_POST[$name];
-}
-
-function sql_select($tid)
-{
-    $conn = mysqli_connect("127.0.0.1", "admin", "12345", "db");
-    $result = mysqli_query($conn, "SELECT * FROM Table_t WHERE tid=`$tid`;");
-    mysqli_close($conn);
-    return $result;
-}
-
-$tid = form_body("tid");
-$r = sql_select($tid);
diff --git a/projects/taint_test3/taint_test3.php b/projects/taint_test3/taint_test3.php
deleted file mode 100644
index 12d3a0b..0000000
--- a/projects/taint_test3/taint_test3.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-
-
-function includeFile($filename)
-{
-    $filename2 = str_replace("php://", "", $filename);
-    include $filename2;
-}
-
-$filename = $_GET["filename"];
-includeFile($filename);
diff --git a/projects/test_1/test_1.php b/projects/test_1/test_1.php
deleted file mode 100644
index ddef8b0..0000000
--- a/projects/test_1/test_1.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-//shell
-$a = $_GET['aaa'];
-shell_exec("ping $a");
-
-$a = md5($a);
-system($a);
-
-//eval
-$b = $_POST["bbb"];
-eval($b);
-
-//database
-$conn = new PDO("host=127.0.0.1;dbname=test1", "root", "admin");
-$c = $_COOKIE["ccc"];
-$conn->query("SELECT * FROM TTT WHERE tid=`$c`;");
-
-//xss
-$d = $_GET["ddd"];
-echo $d;
-
-//include
-$e = $_POST["eee"];
-include $e;
-
diff --git a/projects/test_xss/test_xss1.php b/projects/test_xss/test_xss1.php
deleted file mode 100644
index a4abe2d..0000000
--- a/projects/test_xss/test_xss1.php
+++ /dev/null
@@ -1,2 +0,0 @@
-<?php
-