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<?php $host = "https://chat.stackoverflow.com/rooms/11/php/"; $currentDomain = preg_replace('(^.+\.(?=[^.]+\.[^.]+$))', $host); echo $currentDomain;
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: preg_replace() expects at least 3 arguments, 2 given in /in/n73SR:5 Stack trace: #0 /in/n73SR(5): preg_replace('(^.+\\.(?=[^.]+\\...', 'https://chat.st...') #1 {main} thrown in /in/n73SR on line 5
Process exited with code 255.

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