Fix variable.undefined (and other) errors (#9513) #13098

Job	Run time
Setup PHP Version for Code Coverage	4s
Others (8.1) / Sanity Tests	2m 47s
Others (8.2) / Sanity Tests	3m 57s
Others (8.3) / Sanity Tests	2m 58s
Others (8.4) / Sanity Tests	2m 31s
SeparateProcess (8.2) / tests	3m 28s
SeparateProcess (8.1) / tests	3m 19s
DatabaseLive (8.4, OCI8, 8.0) / tests	6m 19s
DatabaseLive (8.3, SQLite3, 8.0) / tests	2m 47s
SeparateProcess (8.3) / tests	3m 21s
DatabaseLive (8.3, Postgre, 8.0) / tests	2m 39s
DatabaseLive (8.1, MySQLi, 8.0) / tests	5m 28s
DatabaseLive (8.4, Postgre, 8.0) / tests	3m 0s
DatabaseLive (8.4, MySQLi, 8.0) / tests	5m 24s
SeparateProcess (8.4) / tests	3m 36s
DatabaseLive (8.1, MySQLi, 5.7) / tests	3m 8s
DatabaseLive (8.2, MySQLi, 8.0) / tests	4m 45s
DatabaseLive (8.1, SQLSRV, 8.0) / tests	5m 27s
DatabaseLive (8.1, Postgre, 8.0) / tests	2m 54s
DatabaseLive (8.2, SQLite3, 8.0) / tests	3m 35s
DatabaseLive (8.1, SQLite3, 8.0) / tests	2m 37s
DatabaseLive (8.3, MySQLi, 8.0) / tests	4m 18s
DatabaseLive (8.2, OCI8, 8.0) / tests	7m 2s
DatabaseLive (8.4, SQLSRV, 8.0) / tests	5m 43s
DatabaseLive (8.3, SQLSRV, 8.0) / tests	5m 14s
DatabaseLive (8.1, OCI8, 8.0) / tests	6m 7s
DatabaseLive (8.2, SQLSRV, 8.0) / tests	5m 56s
DatabaseLive (8.3, OCI8, 8.0) / tests	6m 41s
DatabaseLive (8.2, Postgre, 8.0) / tests	3m 29s
CacheLive (8.4) / Cache Live Tests	2m 11s
CacheLive (8.3) / Cache Live Tests	2m 14s
DatabaseLive (8.4, SQLite3, 8.0) / tests	2m 56s
CacheLive (8.2) / Cache Live Tests	2m 30s
CacheLive (8.1) / Cache Live Tests	2m 18s
Upload coverage results to Coveralls / coveralls	45s
	2h 11m 28s

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