In PHP, what is the difference between $this::error and $this->error, and how can it affect the functionality of the code?

In PHP, $this::error refers to accessing a static property or method of a class using the scope resolution operator (::), while $this->error refers to accessing a non-static property or method using the object instance operator (->). Using $this::error to access a non-static property or method can lead to errors or unexpected behavior, as it is not the correct syntax for accessing instance properties or methods. 

class Example {
    public $error = 'An error occurred';
    
    public function displayError() {
        echo $this->error; // Correct way to access instance property
    }
}

$example = new Example();
$example->displayError();

Keywords

PHP $this::error $this->error object-oriented programming code functionality

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