Тег <textarea></textarea>

Этот тег определяет многострочное поле ввода.

index.php

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Name Page</title>
</head>
<body>
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$a = (string)trim(htmlspecialchars($_POST['a'], ENT_QUOTES));
if($_REQUEST['clear']) {
$a = null;
}
}
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<fieldset>
<legend>This data will send into a server</legend>
<br />
<textarea name="a" cols="50" rows="10" wrap="hard" autofocus="autofocus"><?php echo $a; ?></textarea>
<br />
<br />
<input type="submit" name="perform" value="Perform" />
  
<input type="submit" name="clear" value="   Clear   " />
<br />
</fieldset>
<fieldset>
<legend>Reading data from a server</legend>
<?php
if($_SERVER['REQUEST_METHOD']=='POST' && $_REQUEST['perform'] && !$_REQUEST['clear']) {
echo '<pre>', $a, '</pre>';
}
else {
echo null;
}
?>
</fieldset>
</form>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Name Page</title>
</head>
<body>
<?php
if($_SERVER['REQUEST_METHOD'] == 'POST') {
$a = (string)trim(htmlspecialchars($_POST['a'], ENT_QUOTES));
if($_REQUEST['clear']) {
$a = null;
}
}
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<fieldset>
<legend>This data will send into a server</legend>
<br />
<textarea name="a" cols="50" rows="10" wrap="hard" autofocus="autofocus"><?php echo $a; ?></textarea>
<br />
<br />
<input type="submit" name="perform" value="Perform" />
  
<input type="submit" name="clear" value="   Clear   " />
<br />
</fieldset>
<fieldset>
<legend>Reading data from a server</legend>
<?php
if($_SERVER['REQUEST_METHOD']=='POST' && $_REQUEST['perform'] && !$_REQUEST['clear']) {
echo '<pre>', $a, '</pre>';
}
else {
echo null;
}
?>
</fieldset>
</form>
</body>
</html>