new.interface

Code example

<?php declare(strict_types = 1);

interface LoggerInterface
{
	public function log(string $message): void;
}

$logger = new LoggerInterface();

Why is it reported?

PHP interfaces cannot be instantiated. An interface defines a contract that classes must implement, but it does not provide concrete implementations of its methods. Attempting to use new with an interface name will result in a fatal error at runtime.

How to fix it

Instantiate a concrete class that implements the interface instead.

 <?php declare(strict_types = 1);

-$logger = new LoggerInterface();
+$logger = new FileLogger();