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<?php $file = '0004f21edd14-boot.cfg'; echo preg_match('/\A0004f2([a-fA-F0-9]{6})-(?boot\.log|app\.log|now-boot\.log)\Z/', $file, $d); print_r($d);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match(): Compilation failed: unrecognized character after (? or (?- at offset 27 in /in/El6Ce on line 3

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