class.toStringDeprecated

Code example

<?php declare(strict_types = 1);

class Foo
{
	/**
	 * @deprecated
	 */
	public function __toString(): string
	{
		return 'foo';
	}
}

function doFoo(Foo $foo): string
{
	return (string) $foo;
}

Why is it reported?

The __toString() method on the class is marked as @deprecated. Casting an instance of this class to a string (via (string), string interpolation, echo, or any implicit string conversion) invokes the deprecated method. This rule is part of the phpstan-deprecation-rules package and warns about usages of deprecated string conversions so they can be replaced before the method is removed.

How to fix it

Use an explicit method to get the string representation instead of relying on the deprecated __toString():

 <?php declare(strict_types = 1);

 function doFoo(Foo $foo): string
 {
-	return (string) $foo;
+	return $foo->getName();
 }