diff --git a/.gitignore b/.gitignore
index d826b3d1..120d6ff8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -28,6 +28,7 @@
 !**/*.jpg
 !**/*.yml
 !**/*.csv
+!**/*.php
 
 # Specific files and directories to include
 !Makefile
diff --git a/var/www.php_site.com/index.php b/var/www.php_site.com/index.php
new file mode 100755
index 00000000..b56f10eb
--- /dev/null
+++ b/var/www.php_site.com/index.php
@@ -0,0 +1,94 @@
+#!/usr/bin/php
+
+<?php
+session_start();
+
+$databaseFile = 'database.txt';
+
+function saveUser($username, $password) {
+    global $databaseFile;
+    $userData = $username . ',' . $password . PHP_EOL;
+    file_put_contents($databaseFile, $userData, FILE_APPEND);
+}
+
+function getUser($username) {
+    global $databaseFile;
+    if (!file_exists($databaseFile)) {
+        return null;
+    }
+    $users = file($databaseFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+    foreach ($users as $user) {
+        list($storedUsername, $storedPassword) = explode(',', $user);
+        if ($storedUsername === $username) {
+            return $storedPassword;
+        }
+    }
+    return null;
+}
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    if (isset($_POST['signup'])) {
+        $username = trim($_POST['username']);
+        $password = trim($_POST['password']);
+
+        if ($username && $password) {
+            if (getUser($username)) {
+                $error = 'Username already exists';
+            } else {
+                saveUser($username, $password);
+                $message = 'Signup successful!';
+            }
+        } else {
+            $error = 'Please enter both username and password';
+        }
+    } elseif (isset($_POST['signin'])) {
+        $username = trim($_POST['username']);
+        $password = trim($_POST['password']);
+
+        if ($username && $password) {
+            $storedPassword = getUser($username);
+            if ($storedPassword && $storedPassword === $password) {
+                $_SESSION['username'] = $username;
+                header('Location: welcome.php');
+                exit;
+            } else {
+                $error = 'Invalid username or password';
+            }
+        } else {
+            $error = 'Please enter both username and password';
+        }
+    }
+}
+?>
+
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sign Up and Sign In</title>
+</head>
+<body>
+    <h2>Sign Up</h2>
+    <?php if (isset($error)) echo '<p style="color:red;">' . $error . '</p>'; ?>
+    <?php if (isset($message)) echo '<p style="color:green;">' . $message . '</p>'; ?>
+    <form method="POST">
+        <label for="signup-username">Username:</label>
+        <input type="text" id="signup-username" name="username" required>
+        <br>
+        <label for="signup-password">Password:</label>
+        <input type="password" id="signup-password" name="password" required>
+        <br>
+        <button type="submit" name="signup">Sign Up</button>
+    </form>
+
+    <h2>Sign In</h2>
+    <form method="POST">
+        <label for="signin-username">Username:</label>
+        <input type="text" id="signin-username" name="username" required>
+        <br>
+        <label for="signin-password">Password:</label>
+        <input type="password" id="signin-password" name="password" required>
+        <br>
+        <button type="submit" name="signin">Sign In</button>
+    </form>
+</body>
+</html>
diff --git a/var/www.php_site.com/logout.php b/var/www.php_site.com/logout.php
new file mode 100644
index 00000000..7e7a48f0
--- /dev/null
+++ b/var/www.php_site.com/logout.php
@@ -0,0 +1,6 @@
+<?php
+session_start();
+session_unset();
+session_destroy();
+header('Location: index.php');
+exit;
diff --git a/var/www.php_site.com/welcome.php b/var/www.php_site.com/welcome.php
new file mode 100644
index 00000000..e69de29b
