Тег <legend></legend>

Этот тег определяет заголовок для элемента <fieldset></fieldset>.

Аргумент	Значение
align	left center right
title	text

index.php

<?php
class Account {
private $val0;
private $val1;
private $sign;
function __construct($arg0, $arg1, $arg2) {
$this->val0 = $arg0;
$this->val1 = $arg1;
$this->sign = $arg2;
}
function Res() {
switch($this->sign) {
case '' :
return null;
break;
case '+' :
return $this->val0 + $this->val1;
break;
case '-' :
return $this->val0 - $this->val1;
break;
case '*' :
return $this->val0 * $this->val1;
break;
case '/' :
if($this->val1 == 0) {
return 'You can not divide by zero!';
}
else {
return $this->val0 / $this->val1;
}
break;
case '%' :
if($this->val1 == 0) {
return 'You can not divide by zero!';
}
else {
return $this->val0 % $this->val1;
}
break;
}
}
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
</head>
<body>
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$val0 = (float)$_POST['val0'];
$val1 = (float)$_POST['val1'];
$sign = $_POST['sign'];
$A = new Account($val0, $val1, $sign);
$res = $A->Res();
if($_REQUEST['clear']) {
$val0 = null;
$sign = null;
$val1 = null;
$res = null;
}
}
?>
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<fieldset>
<legend>The calculator</legend>
<input type="text" name="val0" value="<?php echo $val0; ?>" />
   
<select name="sign">
<option value=""><?php echo $sign; ?></option>
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
<option value="%">%</option>
</select>
   
<input type="text" name="val1" value="<?php echo $val1; ?>" />
   
<input type="submit" name="perform" value="=" />
   
<input type="text" name="res" value="<?php echo $res; ?>" />
   
<input type="submit" name="clear" value="Clear" />
</fieldset>
<fieldset>
<legend>The result</legend>
<?php
if($_SERVER['REQUEST_METHOD']=='POST' && $_REQUEST['perform'] && !$_REQUEST['clear']) {
echo $val0, ' ', $sign, ' ', $val1, ' = ', $res;
}
else {
echo null;
}
?>
</fieldset>
</form>
</body>
</html>

<?php
class Account {
private $val0;
private $val1;
private $sign;
function __construct($arg0, $arg1, $arg2) {
$this->val0 = $arg0;
$this->val1 = $arg1;
$this->sign = $arg2;
}
function Res() {
switch($this->sign) {
case '' :
return null;
break;
case '+' :
return $this->val0 + $this->val1;
break;
case '-' :
return $this->val0 - $this->val1;
break;
case '*' :
return $this->val0 * $this->val1;
break;
case '/' :
if($this->val1 == 0) {
return 'You can not divide by zero!';
}
else {
return $this->val0 / $this->val1;
}
break;
case '%' :
if($this->val1 == 0) {
return 'You can not divide by zero!';
}
else {
return $this->val0 % $this->val1;
}
break;
}
}
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
</head>
<body>
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$val0 = (float)$_POST['val0'];
$val1 = (float)$_POST['val1'];
$sign = $_POST['sign'];
$A = new Account($val0, $val1, $sign);
$res = $A->Res();
if($_REQUEST['clear']) {
$val0 = null;
$sign = null;
$val1 = null;
$res = null;
}
}
?>
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<fieldset>
<legend>The calculator</legend>
<input type="text" name="val0" value="<?php echo $val0; ?>" />
   
<select name="sign">
<option value=""><?php echo $sign; ?></option>
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
<option value="%">%</option>
</select>
   
<input type="text" name="val1" value="<?php echo $val1; ?>" />
   
<input type="submit" name="perform" value="=" />
   
<input type="text" name="res" value="<?php echo $res; ?>" />
   
<input type="submit" name="clear" value="Clear" />
</fieldset>
<fieldset>
<legend>The result</legend>
<?php
if($_SERVER['REQUEST_METHOD']=='POST' && $_REQUEST['perform'] && !$_REQUEST['clear']) {
echo $val0, ' ', $sign, ' ', $val1, ' = ', $res;
}
else {
echo null;
}
?>
</fieldset>
</form>
</body>
</html>