Fixed latest coding style issues and refined a few PHP doc entries to match types #586

Job	Run time
PHPUnit (PHP 7.1)	30s
PHPUnit coverage (PHP 7.4)	1m 11s
PHPUnit (PHP 7.2)	36s
Tests alternative autoloader (PHP 7.1)	18s
PHPUnit Composer v2 (PHP 7.4)	50s
PHPUnit (PHP 7.3)	31s
Tests alternative autoloader (PHP 7.2)	7s
PHPUnit (PHP 7.4)	26s
PHPUnit (PHP 8.0)	29s
PHPUnit lowest deps (PHP 7.3)	38s
Tests alternative autoloader (PHP 7.3)	20s
PHPUnit (PHP 8.1)	39s
Tests alternative autoloader (PHP 7.4)	12s
PHPUnit (PHP 8.2)	44s
Tests alternative autoloader (PHP 8.0)	7s
PHPUnit (PHP 8.3)	33s
Windows-Tests with PHP 7.1	1m 15s
Tests alternative autoloader (PHP 8.1)	14s
Windows-Tests with PHP 7.2	57s
Tests alternative autoloader (PHP 8.2)	7s
Windows-Tests with PHP 7.3	1m 2s
Windows-Tests with PHP 7.4	56s
Tests alternative autoloader (PHP 8.3)	5s
Windows-Tests with PHP 8.0	55s
Windows-Tests with PHP 8.1	1m 2s
Windows-Tests with PHP 8.2	1m 2s
Windows-Tests with PHP 8.3	1m 1s
	16m 47s

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