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<?php function koapToNum($koap){ $o = array('/[^\d\.]/','\.\.'); $n = array('','.'); $digit = preg_replace($o, $n, $koap); return $digit; } echo koapToNum('12.21.1 ч.1.1');
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_replace(): Delimiter must not be alphanumeric, backslash, or NUL in /in/o1l4K on line 5

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