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<?php var_dump(unserialize('a:1:{i:0;a:2:{s:8:"TERMINAL";s:6:"SERVER";s:8:"Terminal";s:6:"Server";}}'));
based on ntrlR
Output for 4.3.0 - 7.2.0
array(1) { [0]=> array(2) { ["TERMINAL"]=> string(6) "SERVER" ["Terminal"]=> string(6) "Server" } }