Every error reported by PHPStan has an error identifier. Here’s a list of all error identifiers. In PHPStan Pro you can see the error identifier next to each error and filter errors by their identifiers.
Code example #
<?php declare(strict_types = 1);
class Foo
{
public function doFoo(): void
{
$fn = static function () use ($this) {
echo $this->bar();
};
}
public function bar(): string
{
return 'bar';
}
}
Why is it reported? #
The $this variable cannot be used as a lexical variable in a closure’s use clause. PHP does not allow use ($this) – it is a syntax error. Non-static closures already have access to $this automatically, so importing it is both unnecessary and invalid.
How to fix it #
Remove $this from the use clause and make the closure non-static so it has access to $this:
<?php declare(strict_types = 1);
class Foo
{
public function doFoo(): void
{
- $fn = static function () use ($this) {
- echo $this->bar();
+ $fn = function () {
+ echo $this->bar();
};
}
public function bar(): string
{
return 'bar';
}
}
Non-ignorable error #
This error cannot be ignored using @phpstan-ignore or the ignoreErrors configuration. Non-ignorable errors indicate code that would cause a crash or a fatal error at runtime, or a fundamental problem in the analysed code that must be addressed.