`$prev` is already defined in exactly the same way on line 66. No need to re-define it.

…s them

Aside from `T_EXIT`, PHP (prior to PHP 8.0) does not allow for the inline use of the other tokens this sniff registers.
While using those tokens inline would result in a parse error, that is not the concern of this sniff.

By ignoring these, the sniff causes false negatives.

This commit makes the sniff more selective and only ignores inline statements for tokens which are allowed in inline statements.

Includes unit test.

The sniff, as it was, only allowed for `or` and `||` logical operators before a termination expression, not for `and`, `&&` or `xor`, while PHP allows these too.

See: https://3v4l.org/OWS4n#veol

Fixed now.

Includes unit tests.

The `T_EXIT` token can be used in ternaries without affecting code after the ternary expression.

See: https://3v4l.org/oMWuA#veol

Fixed now.

Includes unit test.

Fixes 2857

… coalesce (equals)

PHP 7.0 introduced the null coalesce operator.
PHP 7.4 introduced the null coalesce equals operator.

The `T_EXIT` token can be used in combination with those without affecting the code directly following it.

See: https://3v4l.org/C218d#veol

Fixed now.

Includes unit test.

Related to 2857

…ions

PHP 7.4 introduced arrow functions. The `T_EXIT` token can be used in those without affecting the code following it.

See: https://3v4l.org/gSrt4#veol

Fixed now.

Includes unit test.

PHP 8.0 introduced the ability to use `throw` as an expression instead of as a statement.
Ref: https://wiki.php.net/rfc/throw_expression

When used as an expression, the `throw` does not necessarily affect the code after it.

See: https://3v4l.org/AmMf2

Fixed now.

Includes unit tests.

Fixes 3592