Тег <input />

Этот тег определяет для ввода данных.

Аргумент	Значение
accept	audio/* video/* image/* MIME-type
alt	text
autocomplete	on off
autofocus	autofocus
checked	checked
disabled	disabled
form	form_id
formaction	URL
formenctype	application/x-www-form-urlencoded multipart/form-data text/plain
formmethod	get post
formnovalidate	formnovalidate
formtarget	_blank _self _parent _top
height	pixel
list	datalist_id
max	number
maxlength	number
min	number
multiple	multiple
name	text
pattern	text
placeholder	text
readonly	readonly
required	required
size	number
src	URL
step	number
value	text
width	pixel
type	button checkbox color date datetime datetime-local email file hidden image month number password radio range reset search submit tel text time url week

index.php

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
</head>
<body>
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$a = (float)$_POST['a'];
if(isset($_POST['num'])) {
$num = $_POST['num'];
}
if($_REQUEST['clear']) {
$a = null;
unset($num);
}
}
?>
<form action="<?php echo $_SERVER["PHP_SELF"]; ?>" method="post">
<fieldset>
<legend>This data will send into a server</legend>
<input type="text" name="a" value="<?php echo $a; ?>" />
   
<label>Enter a number</label>
<br />
<br />
<label>Choice a number</label>
<br />
<br />
<input type="checkbox" name="num[]" value="1" />
 
<label>1</label>
<br />
<input type="checkbox" name="num[]" value="2" />
 
<label>2</label>
<br />
<input type="checkbox" name="num[]" value="3" />
 
<label>3</label>
<br />
<br />
<input type="submit" name="perform" value="Perform" />
   
<input type="submit" name="clear" value="   Clear   " />
</fieldset>
<br />
<fieldset>
<legend>Reading data from a server</legend>
<?php
if($_SERVER['REQUEST_METHOD']=='POST' && $_REQUEST['perform'] && !$_REQUEST['clear']) {
echo $a, ' ';
$res = 0;
foreach($num as $key => $value) {
$res += (int)$value;
echo ' + ', $value;
}
echo ' = ', '<b>', $a + $res, '</b>';
}
else {
echo null;
}
?>
<br />
</fieldset>
</form>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
</head>
<body>
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$a = (float)$_POST['a'];
if(isset($_POST['num'])) {
$num = $_POST['num'];
}
if($_REQUEST['clear']) {
$a = null;
unset($num);
}
}
?>
<form action="<?php echo $_SERVER["PHP_SELF"]; ?>" method="post">
<fieldset>
<legend>This data will send into a server</legend>
<input type="text" name="a" value="<?php echo $a; ?>" />
   
<label>Enter a number</label>
<br />
<br />
<label>Choice a number</label>
<br />
<br />
<input type="checkbox" name="num[]" value="1" />
 
<label>1</label>
<br />
<input type="checkbox" name="num[]" value="2" />
 
<label>2</label>
<br />
<input type="checkbox" name="num[]" value="3" />
 
<label>3</label>
<br />
<br />
<input type="submit" name="perform" value="Perform" />
   
<input type="submit" name="clear" value="   Clear   " />
</fieldset>
<br />
<fieldset>
<legend>Reading data from a server</legend>
<?php
if($_SERVER['REQUEST_METHOD']=='POST' && $_REQUEST['perform'] && !$_REQUEST['clear']) {
echo $a, ' ';
$res = 0;
foreach($num as $key => $value) {
$res += (int)$value;
echo ' + ', $value;
}
echo ' = ', '<b>', $a + $res, '</b>';
}
else {
echo null;
}
?>
<br />
</fieldset>
</form>
</body>
</html>