encapsulation

Author: mostafa6765

encapsulation/readme.md

@@ -1,31 +1,64 @@
 # Encapsulation
+
 Encapsulation is a process of wraping/combine/bind properties and methods (behavior) in a single unit or single container.
 
 ![https://www.sitesbay.com/cpp/images/encapsulation-in-cpp.png](https://www.sitesbay.com/cpp/images/encapsulation-in-cpp.png)
 
-all state is private , cannot change the state. Only can change with public function.
+All state are private , cannot change  state. Only can change with public function.
 
-~ Encapsulation or information hiding
+# key points of encapsulation.
 
-~ Hide internal states and values inside a class, (safe the modification of state)
+* Information hiding
+* Hide internal states and behavior from external world
+* Protect the modification of state
 
-```php
-class Cat
-{
-  private hungry;
+# Example of encapsulation (php)
 
-  public function feedNow()
-  {
-    $this->hungry = 'feed';
+```php
+class BankAccount {
+  private $balance;
+  
+  public function __construct($initialBalance) {
+    $this->balance = $initialBalance;
+  }
+  
+  public function deposit($amount) {
+    $this->balance += $amount;
+  }
+  
+  public function withdraw($amount) {
+    if ($this->balance >= $amount) {
+      $this->balance -= $amount;
+    } else {
+      throw new Exception("Insufficient funds");
+    }
+  }
+  
+  public function getBalance() {
+    return $this->balance;
   }
 }
+
+$bankAccount = new BankAccount(1000);
+
+// Make a deposit
+$bankAccount->deposit(500);
+
+// Make a withdrawal
+try {
+  $bankAccount->withdraw(2000);
+} catch (Exception $e) {
+  echo $e->getMessage(); // Output: Insufficient funds
+}
+
+echo $bankAccount->getBalance(); // Output: 1500
 ```
 
-# encapsulation vs abstraction
+# Difference between encapsulation and abstraction
 
 * https://stackoverflow.com/questions/15176356/difference-between-encapsulation-and-abstraction
 
-# resources
+# Resources
 
 * https://www.sitesbay.com/cpp/cpp-encapsulation
 * https://www.freecodecamp.org/news/object-oriented-programming-concepts-21bb035f7260/