For such conditional evaluation, use PHP if(), else if() and else.
Example
The PHP code is as follows
<!DOCTYPE html> <html> <body> <?php $gameMode="BUY"; if($gameMode=="TRY") echo "GAME IS IN ",$gameMode," MODE","<br>"; else if($gameMode=="BUY") echo "GAME IS IN ",$gameMode," MODE","<br>"; else echo "GAME IS NEITHER TRY NOR BUY MODE","<br>"; ?> </body> </html>
Output
GAME IS IN BUY MODE