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Или можете посмотреть работу КАЛЬКУЛЯТОРА
"; echo ""; echo "
"; echo ""; echo "
"; echo "+"; echo "-"; echo "*"; echo "/"; echo "
"; echo ""; echo ""; if (isset($_REQUEST['x'])&& (isset($_REQUEST['y'])&& (isset($_REQUEST['test'])))) {switch ($_REQUEST['test']) {case "plus": echo $_REQUEST['x']+$_REQUEST['y']; break; case "minus": echo $_REQUEST['x']-$_REQUEST['y']; break; case "umnojit": echo $_REQUEST['x']*$_REQUEST['y']; break; case "delit": echo $_REQUEST['x']/$_REQUEST['y']; break; default: echo "error"; } } ?>
<DOCTYPE HTML>
<html>
<head>
<title>Мой первый калькулятор на php</title>
<body>
<?php
echo "<form method=post action=calc.php>";
echo "<input type=text name=x>";
echo "</br>";
echo "<input type=text name=y>";
echo "</br>";
echo "<input type=radio name=test value=plus>+";
echo "<input type=radio name=test value=minus>-";
echo "<input type=radio name=test value=umnojit>*";
echo "<input type=radio name=test value=delit>/";
echo "</br>";
echo "<input type=submit name=sabmit value=Cчитать>";
echo "</form>";
if (isset($_REQUEST['x'])&&
(isset($_REQUEST['y'])&&
(isset($_REQUEST['test']))))
{switch ($_REQUEST['test'])
{case "plus":
echo $_REQUEST['x']+$_REQUEST['y'];
break;
case "minus":
echo $_REQUEST['x']-$_REQUEST['y'];
break;
case "umnojit":
echo $_REQUEST['x']*$_REQUEST['y'];
break;
case "delit":
echo $_REQUEST['x']/$_REQUEST['y'];
break;
default:
echo "error";
}
}
?>
</body>
</html>
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