[ondrejmirtes]

Adds rules for PHP language deprecations and errors from PHP 7.3 through 8.5 that weren't reported until now. Each one is gated by a new PhpVersion method, so it only fires when the analysed PHP version is affected. Where the rewrite provably keeps the current behaviour, the error is fixable with --fix.

One commit per deprecation:

PHP	Reported	Fix
7.3	continue targeting a switch (compile-time warning)	break, only when no loop encloses the switch. Inside a loop the tip suggests the continue N that reaches the nearest loop.
8.1	Assigning to, destructuring into, incrementing, unsetting, iterating into or referencing $GLOBALS itself (compile-time error)	–
8.1	current(), pos(), key(), next(), prev(), reset(), end() on objects, respecting the rule level for unions	–
8.1	Calling static methods and accessing static properties directly on a trait	–
8.2	HTML-ENTITIES, BASE64, UUENCODE, Quoted-Printable (and aliases) as the encoding of mbstring functions	–
8.3	get_class() / get_parent_class() without arguments; get_class() without arguments outside of a class (throws an Error)	self::class / parent::class (only when a parent class is known)
8.4	trigger_error() / user_error() with E_USER_ERROR	–
8.4	Power of base 0 and negative exponent (**, **=, pow())	fpow(), which returns the same IEEE 754 result, for int and float operands
8.4	fgetcsv(), fputcsv(), str_getcsv(), SplFileObject::setCsvControl() without $escape	Passes the current default explicitly
8.4	_ as a class, interface, trait or enum name	–
8.5	__debugInfo() returning null, explicitly or implicitly	return [];
8.5	ord() with a string that is not exactly one byte long	Passes the first byte
8.5	$context passed to finfo_buffer() / finfo::buffer()	Removes the argument

Fixes are not offered where they would drop side effects, for example return $this->log(); in __debugInfo() or context: stream_context_create().

I ran every test fixture on real PHP runtimes (8.5.8, and 8.4 for older behaviour). The reported lines match exactly where PHP emits the deprecation, and each .fixed file prints the same output with the fixed deprecations gone. That run also shaped a few edge cases:

• A named argument that skips over $escape counts as passing it, so that call is not reported.
• SplFileObject::fgetcsv() and fputcsv() are left out, because an earlier setCsvControl() call silences them.
• Encoding lists in $from_encoding never trigger the mbstring deprecation, so they are excluded.
• Under strict_types, ord(12) is a TypeError that the argument type check already reports, so this rule skips it.