Fix compatibility with phplrt 3.6 #215

Job	Run time
PHP 8.1, ubuntu-latest, prefer-lowest	14s
PHP 8.1, ubuntu-latest, prefer-stable	17s
PHP 8.1, macos-latest, prefer-lowest	1m 11s
PHP 8.1, macos-latest, prefer-stable	1m 14s
PHP 8.1, windows-latest, prefer-lowest	41s
PHP 8.1, windows-latest, prefer-stable	34s
PHP 8.2, ubuntu-latest, prefer-lowest	26s
PHP 8.2, ubuntu-latest, prefer-stable	13s
PHP 8.2, macos-latest, prefer-lowest	1m 23s
PHP 8.2, macos-latest, prefer-stable	1m 26s
PHP 8.2, windows-latest, prefer-lowest	34s
PHP 8.2, windows-latest, prefer-stable	1m 11s
PHP 8.3, ubuntu-latest, prefer-lowest	17s
PHP 8.3, ubuntu-latest, prefer-stable	12s
PHP 8.3, macos-latest, prefer-lowest	1m 12s
PHP 8.3, macos-latest, prefer-stable	1m 14s
PHP 8.3, windows-latest, prefer-lowest	38s
PHP 8.3, windows-latest, prefer-stable	36s
PHP 8.4, ubuntu-latest, prefer-lowest	16s
PHP 8.4, ubuntu-latest, prefer-stable	13s
PHP 8.4, macos-latest, prefer-lowest	1m 23s
PHP 8.4, macos-latest, prefer-stable	1m 33s
PHP 8.4, windows-latest, prefer-lowest	38s
PHP 8.4, windows-latest, prefer-stable	33s
	18m 9s

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