显示code39条形码的PHP类[3]

            case "c":return ("303021202");
            case "d":return ("202031203");
            case "e":return ("302031202");
            case "f":return ("203031202");
            case "g":return ("202021303");
            case "h":return ("302021302");
            case "i":return ("203021300");
            case "j":return ("202031302");
            case "k":return ("302020213");
            case "l":return ("203020213");
            case "m":return ("303020212");
            case "n":return ("202030213");
            case "o":return ("302030212");
            case "p":return ("203030212");
            case "q":return ("202020313");
            case "r":return ("302020312");
            case "s":return ("203020312");
            case "t":return ("202030312");
            case "u":return ("312020203");
            case "v":return ("213020203");
            case "w":return ("313020202");
            case "x":return ("212030203");
            case "y":return ("312030202");