PHP - Html Transfer Code

\s)([a-z]+)\(/i" ,"\\1<font color='{$color_4}'>\\2</font>(", $str);
        $str = preg_replace("/\.(\w+)(?!\()/i" ,".<font color='{$color_3}'>\\1</font>", $str);
        $str = preg_replace("/\/\/([^\n]*)\n/e" ,"script_highlight_note('\\1', false)", $str);
        $str = preg_replace("/\/\*(.*?)\*\//es" ,"script_highlight_note('\\1')", $str);       
        $str = str_replace("\t", "&nbsp; &nbsp; ", $str);
        $str = str_replace("&equal;","=",$str);
        $str = str_replace("&vertical;","

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