<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>PHP-28-10-2015</title>
<link href="css/bootstrap.min.css" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script src="js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<div class="col-md-6 col-md-offset-3">
<form action='action.php' method="post">
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="number" class="form-control" id="exampleInputEmail1" placeholder="num1" name="num1">
</div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="number" name="num2" class="form-control" id="exampleInputPassword1" placeholder="num2">
</div>
<!--
<div class="form-group">
<label for="exampleInputFile">File input</label>
<input type="file" id="exampleInputFile">
<p class="help-block">Example block-level help text here.</p>
</div>
<div class="checkbox">
<label>
<input type="checkbox"> Check me out
</label>
</div>
-->
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>page2</title>
</head>
<body>
<?php
error_reporting(0);
$num1 = $_POST['num1'];
$num2 = $_POST['num2'];
session_start();
$_SESSION["a"] = $num1;
$_SESSION["b"] = $num2;
echo 'Inserted value is '. $num1 . 'and '. $num2 .'<br>';
$add = $_POST['add'];
$sub = $_POST['sub'];
$mul = $_POST['mul'];
$div = $_POST['div'];
// if(isset($add)){
// echo $_SESSION["a"]+$_SESSION["b"];
//
// }
// elseif(isset($sub)){
// echo $_SESSION["a"] - $_SESSION["b"];
//
// }
// elseif(isset($mul)){
// echo $_SESSION["a"] * $_SESSION["b"];
//
// }
// elseif(isset($div)){
// echo $_SESSION["a"] / $_SESSION["b"];
//
// }
if(isset($add)){
echo $num1+$num2;
}
elseif(isset($sub)){
echo $num1-$num2;;
}
elseif(isset($mul)){
echo $num1*$num2;;
}
elseif(isset($div)){
echo $num1/$num2;;
}
?>
<form action="" method="post">
<input type="hidden" value="<?php echo $num1?>" name="num1">
<input type="hidden" value="<?php echo $num2?>" name="num2">
<input type="submit" name="add" value='+'>
<input type="submit" name="sub" value='-'>
<input type="submit" name="mul" value='x'>
<input type="submit" name="div" value='/'>
</form>
</body>
</html>