PHP OOP Static Methods

⚡ PHP OOP Static Methods

In PHP OOP Static Methods belongs to the class, NOT the object.

✔ You can call it without creating an object
✔ Use the keyword static
✔ Access using ClassName::methodName()

1️⃣ Basic Static Method Example

2️⃣ Static Method Inside Class

You can still call static methods from inside the class using self::.

3️⃣ Static Method with Parameters

4️⃣ Static Method vs Object Method

Type	Called By	Use
Static Method	`ClassName::method()`	Utility functions, helpers
Object Method	`$object->method()`	When data belongs to object

5️⃣ Static Methods Cannot Use `$this`

❌ This will cause an error:

6️⃣ Calling Static Methods from Child Classes (Inheritance)

7️⃣ Overriding Static Methods in Child Class

8️⃣ Late Static Binding (Important)

Use static:: when you want the child class’s static method/property.

class A {
public static function test() {
static::hello();
}

public static function hello() {
echo "Hello from A";
}
}

class B extends A {
public static function hello() {
echo "Hello from B";
}
}

B::test(); // Output: Hello from B

class A {

public static function test() {

static::hello();

}

public static function hello() {

echo "Hello from A";

}

class B extends A {

public static function hello() {

echo "Hello from B";

}

B::test(); // Output: Hello from B

9️⃣ Real-Life Example – Helper Class

1️⃣0️⃣ Real-Life Example – DB Connection (Singleton Pattern)

🎯 Summary (Easy to Remember)

Feature	Meaning
static method	Belongs to class, not object
Access using	`ClassName::method()`
No `$this`	✔ Cannot use `$this` inside static
Good for	Utility methods, helpers, math functions
Works with inheritance	✔ Yes

PHP OOP Static Methods