Someone
public text v1 · immutable$string='C-112-ST-PA-ZD-F-S';
$pieces = explode('-',$string);
echo "{$pieces[0]}-{$pieces[1]}{$pieces[2]} " . implode(' ',array_slice($pieces,3));
//Output
//C-112ST PA ZD F S$string='C-112-ST-PA-ZD-F-S';
$pieces = explode('-',$string);
echo "{$pieces[0]}-{$pieces[1]}{$pieces[2]} " . implode(' ',array_slice($pieces,3));
//Output
//C-112ST PA ZD F S