Question

我的网页与更新语句有数据库连接。我有submit button，点击按钮，数据库需要更新。但是在访问特定页面或刷新页面时，它会自动更新数据库。我没有设置任何功能或其他任何功能。

这是php代码：

<?php 

$connect=mysqli_connect('127.0.0.1', 'root', 'root',"web");
if (isset($_GET['submit'])){
    $query = "UPDATE student AS t1 
              INNER JOIN employer AS t2 ON t1.stud_location = t2.emp_location 
              SET t1.emp_id = t2.emp_id";
    $search_result =mysqli_query($connect,$query); 
} else { 
    $query = "UPDATE student AS t1 
              INNER JOIN employer AS t2 ON t1.stud_location = t2.emp_location 
              SET t1.emp_id = t2.emp_id";
    $search_result =mysqli_query($connect,$query);
}
?>

Answer 1

您声明您只想在提交表单时更新，如果是这样，您最好的选择是使用$ _POST而不是$ _GET。此外，您告诉您的页面，如果$ _GET ['submit']存在，则执行此操作，否则运行此操作（这与它确实存在时相同。）您应该阅读PHP dealing with Forms 如果您希望查询仅在表单已提交时运行，则应具有以下内容：

    <?php 

$connect=mysqli_connect('127.0.0.1', 'root', 'root',"web");
if (isset($_POST['submit'])){
    $query = "UPDATE student AS t1 INNER JOIN employer AS t2 ON t1.stud_location = t2.emp_location SET t1.emp_id = t2.emp_id";
    $search_result =mysqli_query($connect,$query); 
}
?>

刷新网页，mysql更新

1 个答案: