What is the purpose of using "$this->" in PHP and when is it necessary to use it within a class?

Using "$this->" in PHP is necessary when accessing class properties or methods within the class itself. It is used to refer to the current instance of the class. This is important when you have multiple instances of the same class and need to differentiate between them. 

class MyClass {
    private $myProperty;

    public function setProperty($value) {
        $this->myProperty = $value;
    }

    public function getProperty() {
        return $this->myProperty;
    }
}

$object = new MyClass();
$object->setProperty("Hello");
echo $object->getProperty(); // Output: Hello

Keywords

$this-> PHP class object-oriented programming scope

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