Question

我使用两个脚本，一个用于从SQL中删除，另一个用于添加到数据库。

我遇到的问题是，在运行添加脚本时，它会立即刷新页面以显示更改。然而，当运行删除脚本时，它不会立即刷新它并且似乎它缓存输出？

如果它确实缓存了重定向到的输出，为什么一个脚本显示添加而另一个脚本没有显示删除？

添加脚本

// Set a URL for the user to be redirected to
$header_URL = "Location: ".WEBURL.DOCROOT."pages/parents-evening/{$_SESSION['status']}/";


// SQL statement using the variables from the user to insert into a specific table
$sql = "INSERT INTO $table ($columns) VALUES ($values);";

// Check that the query was successful
if(mysqli_query($conn, $sql))
{
    // Success
    // Closes the database connection
    mysqli_close($conn);
    // Sets the redirect location
    header($header_URL);
    // Exits the script
    exit();
}
else
{
    // Fail
    // Closes the database connection
    mysqli_close($conn);
    // Sets the redirect location
    header($header_URL);
    // Exits the script
    exit();
}

删除脚本

// Set a URL for the user to be redirected to
$header_URL = "Location: ".WEBURL.DOCROOT."pages/parents-evening/{$_SESSION['status']}/";

// SQL statement to delete from the table provided where the ID is equal to either the POST or GET value
$sql = "DELETE FROM {$table} WHERE id = {$_POST['delete_id']}{$_GET['delete_id']}";

// Check the query was successful
if(mysqli_query($conn, $sql))
{
    // Success
    // Closes the database connection
    mysqli_close($conn);
    // Sets the redirect location
    header($header_URL);
    // Exits the script
    exit();
}
else
{
    // Fail
    // Closes the database connection
    mysqli_close($conn);
    // Sets the redirect location
    header($header_URL);
    // Exits the script
    exit();
}

Answer 1

似乎问题出现在这个陈述中：

$ sql =“DELETE FROM {$ table} WHERE id = {$ _POST ['delete_id']} {$ _ GET ['delete_id']}”;

如果您从let enrichedUser = case decode $ r2 ^. responseBody of Nothing -> defaultEnrichment u Just e -> e return enrichedUser获得delete_id，则查询将为：

POST

如果您从$sql = "DELETE FROM {$table} WHERE id = ".$_POST['delete_id'];获得delete_id，则查询将为：

GET

如果只有一条记录要删除（因为似乎$sql = "DELETE FROM {$table} WHERE id = ".$_GET['delete_id'];是主键，所以只有一条记录），我建议使用id，因为它会加快删除过程如果您的表中有大量数据。

限制1将告诉数据库只删除一条记录，以便在删除1条记录时停止执行。

您的最终查询将是：

limit 1

POST

$sql = "DELETE FROM {$table} WHERE id = ".$_POST['delete_id']." LIMIT 1";

GET

从一个脚本执行它时使用标题刷新数据，而另一个脚本不刷新数据？

1 个答案: