111.php:
<?PHP
$a = rand(0,9);
$b = rand(0,9);
$check = $_POST['check'];
$value = $_POST['value'];
if (isset($check))
{
if ($check==$value)
echo "<script>alert('回答正确');location.href='111.php';</script>";
else
echo "<script>alert('回答错误');location.href='111.php';</script>";
unset($check);
exit;
}
else
{
?>
<form action="111.php" method="post">
<input type="text" name="check" />
回答问题<?=$a?>+<?=$b?><br/>
<input type="hidden" name="value" value="<?=$a+$b?>" />
<input type="submit" />
</form>
<?php
}
?>
