doujue6196 2012-12-27 12:41
浏览 55

在浏览器刷新后,即使使用isset()提交按钮检查,PHP脚本仍然会执行

I am self studying newbie to PHP. I would like to run a small PHP script only if the submit button is clicked. Unfortunately the function isset() that (according to my tutorial lesson) performs this submit button check -does not seem to be working !

When I refresh the page in the browser, part of the PHP script: print("You're not a member of this site"); is still getting executed even though I have not yet pressed the submit button! Why?

and the code:

<html>
<head>
    <title>A BASIC HTML FORM</title>

    <?PHP
        if (isset($_POST['Submit1'])) {
            $username = $_POST['username'];

            if ($username == "letmein") {

                print ("Welcome back, friend!");

            }
            else {

                print ("You're not a member of this site");

            }
        }
    ?>
</head>
    <body>
        <Form name ="form1" Method ="POST" Action ="basicForm.php">
            <INPUT TYPE = "TEXT" VALUE ="username" NAME="username">
<p>

            <Input Type = "Submit" Name = "Submit1" Value = "Login">
        </FORM>
    </body>
</html>
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3条回答 默认 最新

  • doumei1772 2012-12-27 12:47
    关注

    instead of isset()

    USE

    !empty($_POST)

    评论

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