Adopt SSP coding-style #137

Job	Run time
PHP-Linter (8.4) / linter	14s
PHP-Linter (8.5) / linter	16s
Linter / style-linter	0s
PHP-Linter (8.3) / linter	15s
Linter / json-linter	29s
PHP-Linter (8.2) / linter	11s
Linter / yaml-linter	5s
Linter / ecmascript-linter	0s
Unit tests, PHP 8.3, windows-latest	1m 11s
Unit tests, PHP 8.4, windows-latest	53s
Unit tests, PHP 8.2, windows-latest	1m 8s
Unit tests, PHP 8.2, ubuntu-latest	18s
Unit tests, PHP 8.4, ubuntu-latest	24s
Unit tests, PHP 8.5, ubuntu-latest	23s
Unit tests, PHP 8.5, windows-latest	1m 1s
Unit tests, PHP 8.3, ubuntu-latest	25s
Code coverage	8s
Security checks	20s
Quality control	30s
Cleanup artifacts	5s
	8m 16s

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