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<?php $s= "https://wwww.gogu.ro"; echo preg_replace("[^[:alpha:]&^[:alnum:]]|[&]|[\^]","-",strtolower($s));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_replace(): Unknown modifier '|' in /in/esA5l on line 4

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