How to do form processing?

L

lik1732020-05-13 21:07:43

PHP

lik173, 2020-05-13 21:07:43

I want to make users simple algorithms.
Type:

/*ЭТО ПРИМЕР!*/
<?php
if (!isset($cardnumber)) $m = "Введите номер карточки";
 elseif ($cardnumber == "" )  $m = "Ваш номер пуст!";
 else $m = "Ваш номер: $cardnumber";
?>
<html>
<head>
<title>Пример обработки ввода</title>
</head>
<body>
<h1><?php echo $m ?></h1>
<form name='form1' action='<?php echo $PHP_SELF ?>' method='post'>
 <p>Номер карточки:
 <input name='cardnumber' type='text' size='20'>
</form>
</body>
</html>

How to do this?
But in a different way, with more variables?

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