bank is a object, it has functins like deposit, withdraw, balance

oop
in bank w real time example
deposit
withdraw
balance	car is also object but has functions
bank is a object, it has functins like deposit, withdraw, balance
<?php
class BankAccount {	declared class
public $balance = 500;	declared property and load the value
}	we createad instances for that class
$rafique = new BankAccount;
echo $rafique-> balance;
?>
<?php
class BankAccount {	because of private property, we cant access that class
private $balance = 500;	we cant display the privarte property
}
$rafique = new BankAccount;	instances
echo $rafique-> balance;
?>
<?php
class BankAccount {	Fatal error: Uncaught Error: Cannot access protected property BankAccount::$balance in C:\xampp\htdocs\vamis\lesson57\oop.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vamis\lesson57\oop.php on line 6
protected $balance = 500;
}
$rafique = new BankAccount;
echo $rafique-> balance;
?>
we cant accss private or protected propertty or functions
<?php
class BankAccount {
protected $balance = 500;
}	we cant display using protected directly
echo BankAccount :: balance;	we can display  using constant only
?>
<?php	we can display the output of this property using const only
class BankAccount {
const balance = 500;	to not chaage valuse if u use constant
}
echo BankAccount :: balance;
?>
output of this programm is 500
<?php
class BankAccount {	pi or square root of 2, like this values ara constant
const balance = 500;
}
$rafique = new BankAccount;	for that constanc values we create this constant property
echo $rafique :: balance;	load the balance to rafiqque variable and it prints
echo $rafique-> balance;
?>
<?php	declared bankaccount is object
class BankAccount {	declared balance is a class and write the 500 t that
public $balance = 500;	write function display balance
public function displayBalance(){	instead of print , store that value
return 'Balance : '.$this-> balance ;	write tha  value to balance
}	what the writen thing in this, display sin return
}	created an object
$rafique = new BankAccount;	print that
echo $rafique -> displayBalance();	we can use -> or :: for constants
?>	at ist time, bank given free amount that only there in bank
Balance : 500
how to incriment the bank account money
after deposit the money
bank account and their properties
ist created class, and get the property as balamce, write display function with this display what it have amd write deposit function, it will show the method how to deposit, and wrute withdraw method, get the amount what customer needs, and give the amount to customer and update the data to customer
<?php	we created a class
class BankAccount {	create a function with first time deposit amount on ist time it is zero
public function __construct(){	using this construct, it will implement immediately after create instance
echo 'instance created';	if we print new object, instance created will print
}
public $balance = 0;	crate a function, to display, whenever it is called,  display the amount what it have by calling this, balance is astring, write the amount to balances
public function displayBalance(){	if it is called, load the amount to balance
return 'Balance : '.$this-> balance. '</br> </br>' ;
}	whenever deposit is called,
public function deposit($amount){	alrady have some balance, add that to amount, and write to this,we added, so that amount write to balance, finally balance has 1000
$this -> balance = $this -> balance + $amount;	sum amount loads to this, that value loads to balance, and that value loads to this
}
public function withdraw($amount){
if ($this -> balance < $amount) { echo  'you have request to withdraw rs.'>$amount.'/- but';
} else {	we have some amount, customer is asking some amount to withdraw, to remove that amount, and write that to balance
$this -> balance = $this -> balance - $amount;
}}
$rafique = new BankAccount;	Balance : 1500
$rafique -> deposit(1000);
$rafique -> withdraw(300);	whenever display balance is called, it shows what the balance variable has
echo $rafique -> displayBalance();
echo '<br>Rafique\'s '.$rafique -> displayBalance();
$vikram = new BankAccount;
$vikram -> deposit(3000);
$vikram -> withdraw(900);
echo 'vikram\'s'. $vikram -> displayBalance();
?>
A constructor allows you to initialize an object's properties upon creation of the object. If you create a __construct() function, PHP will automatically call this function when you create an object from a class. <?php class Fruit {   public $name;   public $color;   function __construct($name) {     $this->name = $name;   }   function get_name() {     return $this->name;   } } $apple = new Fruit("Apple"); echo $apple->get_name(); ?>
created one class, to create object we have to creaate blue print for object called class create a variables for class using public, we can acess public variables directly, we cant access that private variables, to acess private variables, call from public, fruit of app,e- apple is a argument, it willl call as $name- that wull store as name, whenever this callled get_name- print name; calll with two arguments <?php class Fruit {   public $name;   public $color;   function __construct($name, $color) {     $this->name = $name;     $this->color = $color;   }   function get_name() {     return $this->name;   }   function get_color() {     return $this->color;   } } $apple = new Fruit("Apple", "red"); echo $apple->get_name(); echo "<br>"; echo $apple->get_color(); ?>

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how to declare a object in script how to declare a property of tha t object while accesing we have to create as a object we have to aceess as objet property how to declare a object can we get as public if it is declared in private can we declare class as object to accss acess the object property can we print in public which we declared in private we cant accss private or protected propertty or functions how to load the data to variable can we declare const for constant values like pi or square root crate a object how to assign data tp variable how to displat what the amount stored in that object how to display the amount stored and how to withdraw the amountand how to deposit the amount will there any statement to execute immdiately of instance to access the data stored in class, wil we declarea as object