PHP
    6
    Вклад в тег
    
      
      
    
  
  
<?php
	session_start();
	if(!isset($_SESSION['count'])) {
		$_SESSION['count']=0;
	}
	if($_SESSION['count']>5) {
		$_SESSION['count'] = 0;
	}
	?>
<!DOCTYPE html>
<html>
<head>
	<title>TEST</title>
	<meta charset="utf-8" />
</head>
<body>
<form class="answer-input-div" method="post" action="<?=$_SERVER['PHP_SELF']?>" <?php if($_SESSION['count']==5) echo "style='display:none;'"; ?>>
	<input type="text" required name="answer" placeholder="Введите ответ в это поле" class="answer-input">
	<button class="answer-button" type="submit">Проверить</button>
</form>
<?php
	$answerinf   = false;
	$answertrue  = 33;
	$usersanswer = $_POST['answer'];
	$istinnost   = "Нет";
	$i = 0;
	if ($usersanswer == $answertrue) {
	    $answerinf = true;
	} else {
	    $_SESSION['count']++;
	}
	if ($answerinf == True) {
	    $istinnost = "Да";
	}
	?>
	<h2>Попыток: <?php echo "{$_SESSION['count']}"?>/5.</h2>
	<h2>Решение: <?php echo "$istinnost"?>.</h2>
</body>
</html>