Question

我在会话变量中存储了一条错误消息，当条件变为false时，它会在页面上显示。现在，我希望在刷新页面时消息消失，从而释放会话变量。

代码： 显示错误消息

<?php 
if (isset($_SESSION['er'])): //Showing Errors on Salary form  ?>
    <div class="form-errors">
        <?php foreach ($_SESSION['er'] as $mistake): ?>
                  <p> <?php echo $mistake ?> </p>
        <?php endforeach ;?>
    </div>
<?php endif; ?>

存储错误

$_SESSION['er'] = array("Salary Must be between 10000 and 80000.");
header("Location:addSalary.php");

Answer 1

打印错误后立即取消设置。因此它只会显示一次

<?php if (isset($_SESSION['er'])): //Showing Errors on Salary form  ?>
  <div class="form-errors">
    <?php foreach ($_SESSION['er'] as $mistake): ?>
      <p> <?php echo $mistake ?> </p>
        <?php endforeach ;?>
  </div>
<?php unset($_SESSION['er']); ?>
<?php endif; ?>

Answer 2

然后，一旦您使用/发送了错误消息，就可以将其删除。

<?php 
if (isset($_SESSION['er'])): ?>
    echo '<div class="form-errors">';

    foreach ($_SESSION['er'] as $mistake): 
        echo "<p>$mistake</p>";
    endforeach;

    echo '</div>';
    unset($_SESSION['er']);
endif; 
?>

PHP会话问题？

2 个答案: