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Bugs & Features
<?php preg_match( 'f?:.+?\.ывауsdfe?)?ывауыаbuyincoins\.(com|ru)/iu', $host, $matches );
Output for 7.3.0rc3
Notice: Undefined variable: host in /in/kiP85 on line 5 Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /in/kiP85 on line 6