第二个提交按钮在PHP中不起作用

Question

I have been having problems with the second button not running like the first button. this is the code I have:

        <p>
            <form method="POST">
                <input placeholder="Username" type="text" name="username"><br /><br />
                <input placeholder="password" type="password" name="password"><br /><br />
                <input value="Login" type="submit" name="log_In">
            </form>
        </p>
    </div>
    <?php
        if(isset($_POST['log_In'])) {
            #$f_name = $_POST['fname'];
            #$s_name = $_POST['sname'];
            #$stud_Id = $_POST['studId'];
            #$uname = $_POST['uname'];
            #$pass = $_POST['pass'];
            #$rpass = $_POST['rpass'];
            #$email = $_POST['email'];
            #$remail = $_POST['remail'];

            #var_dump($f_name);

            header("Location:home.php");

        }
    ?>
</div>
<div align="right">
    <div>
        <p>
            <h2>Sign Up</h2>
        </p>
        <p>
            <form>
                <input placeholder="Forename" type="text" name="fname" id="Forename"><br /><br />
                <input placeholder="Surname" type="text" name="sname"><br /><br />
                <input placeholder="Student Id" type="text" name="studId"><br /><br />
                <input placeholder="Username" type="text" name="uname"><br /><br />
                <input placeholder="password" type="password" name="pass" min="6" max="32"><br /><br />
                <input placeholder="Re-type password" type="password" name="rpass" min="6" max="32"><br /><br />
                <input placeholder="Email" type="" name="email"><br /><br />
                <input placeholder="Re-type Email" type="remail" name="remail"><br /><br />
                <input value="Sign Up" type="submit" name="sign_Up">
            </form>
        </p>
    </div>
    <?php
        if(isset($_POST['sign_Up'])) {
            header("Location:home.php");
        }
    ?>
</div>

"if(isset($_POST['sign_up'])) {" is not being run and is just refreshing the page and removing all items from the form.

thanks

Answer 1

By default <form> method is GET. So if(isset($_POST['sign_Up'])) won't work. Change it to if(isset($_GET['sign_Up'])) .

Or change your second form tag to:

<form method="POST">

Remember not to use header function after generating HTML content, move it to top!

header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP.

So it will be better if it is like this:

<?php
        if(isset($_POST['log_In']) || isset($_POST['sign_Up'])) {
            header("Location:home.php");
        }
?>
<form method="POST">
    <input placeholder="Username" type="text" name="username">
    <br />
    <br />
    <input placeholder="password" type="password" name="password">
    <br />
    <br />
    <input value="Login" type="submit" name="log_In">
</form>

<div align="right">
    <div>
        <p>
             <h2>Sign Up</h2>
        </p>
        <p>
            <form method="post">
                <input placeholder="Forename" type="text" name="fname" id="Forename">
                <br />
                <br />
                <input placeholder="Surname" type="text" name="sname">
                <br />
                <br />
                <input placeholder="Student Id" type="text" name="studId">
                <br />
                <br />
                <input placeholder="Username" type="text" name="uname">
                <br />
                <br />
                <input placeholder="password" type="password" name="pass" min="6" max="32">
                <br />
                <br />
                <input placeholder="Re-type password" type="password" name="rpass" min="6" max="32">
                <br />
                <br />
                <input placeholder="Email" type="" name="email">
                <br />
                <br />
                <input placeholder="Re-type Email" type="remail" name="remail">
                <br />
                <br />
                <input value="Sign Up" type="submit" name="sign_Up">
            </form>
        </p>
    </div>
</div>

Answer 2

You forgot to add method="post"

<form method="post">
            <input placeholder="Forename" type="text" name="fname" id="Forename"><br /><br />
            <input placeholder="Surname" type="text" name="sname"><br /><br />
            <input placeholder="Student Id" type="text" name="studId"><br /><br />
            <input placeholder="Username" type="text" name="uname"><br /><br />
            <input placeholder="password" type="password" name="pass" min="6" max="32"><br /><br />
            <input placeholder="Re-type password" type="password" name="rpass" min="6" max="32"><br /><br />
            <input placeholder="Email" type="" name="email"><br /><br />
            <input placeholder="Re-type Email" type="remail" name="remail"><br /><br />
            <input value="Sign Up" type="submit" name="sign_Up">
        </form>

Answer 3

在第二种形式中，您尚未定义方法，如果未定义method，它将接受默认的GET方法，因此可以通过以下方式更改第二种形式的标签：

<form action="" method="POST">