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<?php $string = "Thank you, Brian, for your kind review and 4-star rating for Champion Comfort Experts! We're so pleased that Josh delivered an exceptional service call, and that you were happy with his performance. We always want to bring our customers the best in home services, so it was great to hear that we are making it happen. If you have the time, please complete our referral form. It might bring your money simply for referring friends, family, and even colleagues! Here's the link: https://www.championcomfortexperts.com/referrals/. Thanks again for choosing Champion Comfort Experts, and we look forward to serving you again in the future!"; $lastCharacter = substr($string, -1); $exceptLastCharacter = substr($string, 0, -1); if(in_array($lastCharacter, ['.', '!']) !== false) { $exceptLastCharacter .= ($lastCharacter === "!") ? "." : (($lastCharacter === ".") ? "!" : ""); } else { $exceptLastCharacter = $string . "."; } echo $exceptLastCharacter;