NullableTypeDeclaration

Verifies that nullable typehints are lacking superfluous whitespace, e.g. ?int

PSR12.Functions.NullableTypeDeclaration

Description

In nullable type declarations there MUST NOT be a space between the question mark and the type.

xml

<rule ref="PSR12.Functions.NullableTypeDeclaration"></rule>

Valid: no whitespace used.

php

public function functionName(
    ?string $arg1,
    ?int $arg2
): ?string {
}

Invalid: superfluous whitespace used.

php

public function functionName(
    ? string $arg1,
    ? int $arg2
): ? string {
}

Valid: no unexpected characters.

php

public function foo(?int $arg): ?string
{
}

Invalid: unexpected characters used.

php

public function bar(? /* comment */ int $arg): ?
    // nullable for a reason
    string
{
}