diff --git a/20241017/func.php b/20241017/func.php
new file mode 100644
index 0000000..656f419
--- /dev/null
+++ b/20241017/func.php
@@ -0,0 +1,34 @@
+<?php
+
+function check_post(){
+    if($_SERVER["REQUEST_METHOD"] == "POST"){
+        $num1 = $_POST["num1"];
+        $num2 = $_POST["num2"];
+        $_SESSION["num1"] = $num1;
+        $_SESSION["num2"] = $num2;
+        
+        if  ($num1>0&& $num2> 0){
+            return true;
+        } else{
+            return false;
+        }
+    } else {
+        return false;
+    }
+}
+
+function add(int $num1, int $num2){
+    return $num1 + $num2;
+}
+
+function add10(int $num){
+    return $num+=10;
+}
+
+function add11(&$num){
+    return $num+= 11;
+}
+
+function nincsertek($num = 100){
+    return $num;
+}
\ No newline at end of file
diff --git a/20241017/html.php b/20241017/html.php
new file mode 100644
index 0000000..5675c08
--- /dev/null
+++ b/20241017/html.php
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Függvények</title>
+</head>
+<body>
+    <form action="" method="POST">
+        <input type="number" name="num1"> + 
+        <input type="number" name="num2">
+        <button type="submit">Összead</button>
+    </form>
+    <p><?php echo $value?></p>
+</body>
+</html>
\ No newline at end of file
diff --git a/20241017/index.php b/20241017/index.php
new file mode 100644
index 0000000..50b9b21
--- /dev/null
+++ b/20241017/index.php
@@ -0,0 +1,21 @@
+<?php
+session_start();
+include("func.php");
+if(check_post()){
+    //$value = add($_POST["num1"], $_POST["num2"]);    
+    //$value = add($num1, $num2);    
+    $value = add($_SESSION["num1"], $_SESSION["num2"]);    
+    global $value;
+    echo add10(5);
+    echo "<br>";
+    $n1 = 5;
+    echo add11($n1);
+    echo "<br>";
+    echo $n1;
+    echo "<br>";
+    echo nincsertek();
+    echo "<br>";
+    echo nincsertek(1);
+}
+
+include("html.php");
\ No newline at end of file
