Kalkulator PHP ciaglosc liczb Opcje

[karolunited]

Wiec robie sobie kalkulator w php,

Narzie jestem juz za tetapem ze gdzie nacisne np guzik "1" to mu wyskoczy "1", jezeli "2" to "2" itp

Teraz bym chcial ze jezeli nacisne "1" i "2" to mu wyskoczy "12" Tzn ciaglosc licz

[PHP] pobierz, plaintext 
<?php  
 
 
    if (isset($_GET['btn']))
    {
      switch ($_GET['btn']) 
      {
      case 1:
      $myText1 = myAction($_GET['btn']);
      break;
      case 2:
      $myText1 =  "2";
      break;
      case 3:
      $myText1 =  "3";
      break;
      case 4:
      $myText1 =  "4";
      break;
      case 5:
      $myText1 =  "5";
      break;
      case 6:
      $myText1 =  "6";
      break;
      case 7:
      $myText1 =  "7";
      break;
      case 8:
      $myText1 =  "8";
      break;
      case 9:
      $myText1 =  "9";
      break;
      case dodawanie:
      $myText1 =  "+";
      break;
      case odejmowanie:
      $myText1 =  "-";
      break;
      case mnozenie:
      $myText1 =  "*";
      break;
      case dzielenie:
      $myText1 =  "/";
      break;
      case przecinek:
      $myText1 =  ".";
      break;
      case 0:
      $myText1 =  "0";
      break;
      case rowna:
      $myText1 =  "=";
      break;
 
      default:
      $myText1 = "0";
 
      }   
 
    }
 
    else {
      $myText1 =0;
 
    }
 
 
    function myAction($myValue){
 
    return  $myValue;
    }
 
 
 
    ?>  
 
    <center>
    <div style="position: absolute; width: 500px; margin-left: 50%; left: -250px;">
    <form action="Kalkulator23.php" method="get">
 
			Kalkulator  </br> </br></br>
 
 
			<input type="text" name="Text1" value="<?php echo $myText1; ?>" style=" width: 210px; float: left; margin-left: 140px;" /> 	
      </br> </br>
			<button type="submit" name="btn" value="C" style="width: 210px;"> C </button>
      </br>                                                                                            
			<button type="submit" name="btn" value="1" style="width:50px;" > 1 </button>
			<button type="submit" name="btn" value="2" style="width:50px;" style="margin-left:10px"; > 2 </button>
			<button type="submit" name="btn" value="3" style="width:50px;" style="margin-left:10px"; > 3 </button>
			<button type="submit" name="btn" value="dodawanie" style="width:50px;" style="margin-left:10px"; > + </button>
			</br>
			<button type="submit" name="btn" value="4" style="width:50px;" style="margin:10px 0px 0px 10px;"; > 4 </button>
			<button type="submit" name="btn" value="5" style="width:50px;" style="margin-left:10px"; > 5 </button>
			<button type="submit" name="btn" value="6" style="width:50px;" style="margin-left:10px"; > 6 </button>
			<button type="submit" name="btn" value="odejmowanie" style="width:50px;" style="margin-left:10px"; > - </button>
			</br>
			<button type="submit" name="btn" value="7" style="width:50px;" style="margin-left:10px"; > 7 </button>
			<button type="submit" name="btn" value="8" style="width:50px;" style="margin-left:10px"; > 8 </button>
			<button type="submit" name="btn" value="9" style="width:50px;" style="margin-left:10px"; > 9 </button>
			<button type="submit" name="btn" value="mnozenie" style="width:50px;" style="margin-left:10px"; > * </button>
			</br>
			<button type="submit" name="btn" value="przecinek" style="width:50px;" style="margin-left:10px"; > , </button>
			<button type="submit" name="btn" value="0" style="width:50px;" style="margin-left:10px"; > 0 </button>
			<button type="submit" name="btn" value="rowna" style="width:50px;" style="margin-left:10px"; > = </button>
			<button type="submit" name="btn" value="dzielenie" style="width:50px;" style="margin-left:10px"; > / </button>    
		</form>
    </div>
    </center>
[PHP] pobierz, plaintext