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<?php $mac = '00:15 :65:3D:E5:BC'; //$mac = strtoupper(str_replace(" \t\n\r\0\x0B-:.", "", $mac)); $mac = strtoupper(preg_replace("/[\s-:.]*/",'', $mac)); echo $mac;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_replace(): Compilation failed: invalid range in character class at offset 3 in /in/ZgJi4 on line 4 Deprecated: strtoupper(): Passing null to parameter #1 ($string) of type string is deprecated in /in/ZgJi4 on line 4

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