Fix php85 mysql attr constant #1548

Job	Run time
Coding Standard & Static Analysis	42s
Windows - PHP 8.1 & SQL Server	2m 44s
testsuite (8.1, mysql)	49s
testsuite (8.1, pgsql)	51s
testsuite (8.5, pgsql)	48s
testsuite (8.5, sqlite)	26s
testsuite (8.2, mysql)	54s
testsuite (8.1, sqlite, prefer-lowest)	37s
testsuite (8.5, mysql)	54s
testsuite (8.1, sqlite)	40s
	9m 25s

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