diff --git a/17-exercici.php b/17-exercici.php
new file mode 100644
index 0000000..0814e1a
--- /dev/null
+++ b/17-exercici.php
@@ -0,0 +1,231 @@
+<?php
+
+class Character extends Type implements Habilities
+{
+    protected string $name;
+    protected string $gender;
+    protected int $age;
+            
+    public function __construct(string $name,string $gender,int  $age,string $nameType,string $HeightType)
+    {
+        parent::__construct($nameType,$HeightType);
+        $this->name = $name;
+        $this->gender = $gender;
+        $this->age = $age;
+
+    }
+        
+    /**
+     * __destruct
+     *
+     * @return void
+     */
+    public function  __destruct()
+    {
+        echo "<br>DESTROYED: " . $this->name . " with gender " . $this->gender . " and race " . $this->age." type: ".$this->nameType." Height ".$this->HeightType;
+    }
+
+    /**
+     * Get the value of name
+     */     
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * Set the value of name
+     *
+     * @return  self
+     */ 
+    public function setName($name)
+    {
+        $this->name = $name;
+
+        return $this;
+    }
+
+    /**
+     * Get the value of gender
+     */ 
+    public function getGender()
+    {
+        return $this->gender;
+    }
+
+    /**
+     * Set the value of gender
+     *
+     * @return  self
+     */ 
+    public function setGender($gender)
+    {
+        $this->gender = $gender;
+
+        return $this;
+    }
+
+     /**
+     * Get the value of age
+     */ 
+    public function getAge()
+    {
+        return $this->age;
+    }
+
+    /**
+     * Set the value of age
+     *
+     * @return  self
+     */ 
+    public function setAge($age)
+    {
+        $this->age = $age;
+
+        return $this;
+    }
+
+    
+    public function run(){
+        return $this->name." is running";
+    }
+
+    public function throw($element){
+        return $this->name." has thrown ".$element;
+    }
+
+    public function getNameType(){
+        return "NameType";
+    }
+
+    public function getHeightType(){
+        return "HeightType";
+    }
+
+    public function __toString()
+    {
+        return "Name: ".$this->name."<br>Gender: ".$this->gender."<br>Race: ".$this->age."<br>";
+    }
+
+
+}
+
+class Heroe extends Character{
+    
+    public string $power = 'Nothing';
+    public static string $world = 'Fantasy World';
+    
+    public function __construct(string $name,string $gender,int  $age,string $nameType,string $HeightType, string $power)
+    {
+        parent::__construct($name,$gender,$age,$nameType,$HeightType);
+        $this->name = "Super ".$name;
+
+        $this->power = $power;
+    }
+    
+
+    /**
+     * Get the value of power
+     */ 
+    public function getPower()
+    {
+        return $this->power;
+    }
+
+    /**
+     * Set the value of power
+     *
+     * @return  self
+     */ 
+    public function setPower($power)
+    {
+        $this->power = $power;
+
+        return $this;
+    }
+
+    public function getName()
+    {
+        return "This method is overrride: ".$this->name;
+    }
+
+    public function __toString()
+    {
+        return "Name: ".$this->name."<br>Gender: ".$this->gender."<br>Race: ".$this->age."<br>". "Power:".$this->power."<br>";
+    }
+
+    public static function powerRequest()
+    {
+        return "Power achieved";
+    }
+
+}
+
+abstract class Type{
+    public string $nameType;
+    public string $HeightType;
+    
+    public function __construct(string $nameType,string $HeightType)
+    {
+        $this->nameType = $nameType;
+        $this->HeightType = $HeightType;   
+    }
+
+    public abstract function getNameType();
+    public abstract function getHeightType();
+
+    public function imprimir(){
+        print $this->getNameType();
+    }
+    
+}
+
+interface Habilities
+{
+    public function run();
+    public function throw($element);
+}
+
+/* BASE CLASS */
+//(string $name,string $gender,int  $age,string $nameType,string $HeightType)
+$c = new Character("Mario","Man",35,"human","1.65");
+echo $c;
+
+echo $c->getName();
+echo "<br>";
+
+/* HERENCY CLASS CHARACTER */
+//(string $name,string $gender,int  $age,string $nameType,string $HeightType, string $power)
+$m = new Heroe("Luigi","Man",38,"Human","1.75","Fire");
+echo $m;
+
+/* STATIC METHOD */
+echo Heroe::powerRequest();
+echo "<br>";
+
+/* STATIC PROPERTY */
+echo Heroe::$world;
+echo "<br>";
+
+echo $m->getPower();
+echo "<br>";
+
+/* OVERRIDING */
+echo $c->getName();
+echo "<br>";
+echo $m->getName();
+
+/* ABSTRACT CLASS */
+echo "<br>";
+echo $c->getNameType();
+echo "<br>";
+echo $c->getHeightType();
+
+
+/* INTERFACE */
+echo "<br>";
+echo $m->run();
+echo "<br>";
+echo $m->throw("Fire");
+echo "<br>";
+
diff --git a/OPP Basics.docx b/OPP Basics.docx
new file mode 100644
index 0000000..31ddeb5
Binary files /dev/null and b/OPP Basics.docx differ
diff --git a/pruebas.php b/pruebas.php
new file mode 100644
index 0000000..a368df5
--- /dev/null
+++ b/pruebas.php
@@ -0,0 +1,28 @@
+<?php 
+
+class Cal{
+    public function sum(){
+        $args = func_get_args();
+        $exp="echo(".implode("+",$args).");";
+        eval($exp);
+    }
+
+    public function __call($funname,$funargs)
+    {
+        //echo $funname."<br>";
+        //echo print_r($funargs);
+        call_user_func_array([$this,'sum'],$funargs);
+    }
+    
+}
+ 
+$ob = new Cal;
+
+try {
+    //$ob->sum(5,10,15);
+ 	$ob->add(10,20); 
+}
+catch(Exception $e) {
+	echo 'Message: ' . $e->getMessage();
+}
+/* $ob->add(10,20);  */