自动执行查询

Question

请任何人解决我的问题，我的代码会自动执行。在这里。

$con=mysql_connect("localhost","root","") or die('Not Connected');;
mysql_select_db("reg");

if (isset($_POST['submit'])) {

    $fname = $_POST['fname'];
    $lname = $_POST['lname'];
    $email = $_POST['email'];
    $username = $_POST['user'];
    $password = $_POST['password'];
    $cpassword = $_POST['cpassword'];

    if($fname=='' or $lname=='' or $email=='' or $username==''
        or $password=='' or $cpassword==''){

        echo "<script>alert('Please Fill Out Blank Fields')</script>";
        exit();
    }
}

$query="INSERT INTO `form`(`ID`, `fname`, `lname`, `email`, `username`, `password`, `cpassword`)
VALUES (NULL, '$fname','$lname','$email','$username','$password','$cpassword')";

if (mysql_query($query)) {

    echo "<script>alert('Registered Successfully')</script>";

}

“这是我的问题：当我刷新页面时，最后一个代码会自动执行”请检查我的代码。

感谢。

Answer 1

<?php
function destroy_foo() 
{
    global $foo;
    unset($foo);
}

$foo = 'bar';
destroy_foo();
echo $foo;
?>

Answer 2

首先，将最后3行放在if块内。这将确保只有在有POST请求时才执行查询。

要处理刷新问题，请使用Post-Redirect-Get模式确保数据不会重新发布。如果查询成功执行，则重定向到新页面，并在那里显示成功消息。

if (isset($_POST['submit'])) {

    $fname = $_POST['fname'];
    $lname = $_POST['lname'];
    $email = $_POST['email'];
    $username = $_POST['user'];
    $password = $_POST['password'];
    $cpassword = $_POST['cpassword'];

    if($fname=='' or $lname=='' or $email=='' or $username==''
        or $password=='' or $cpassword==''){

        echo "<script>alert('Please Fill Out Blank Fields')</script>";
        exit();
    }

    // Run this query only if something was POSTed.
    $query="INSERT INTO `form`(`ID`, `fname`, `lname`, `email`, `username`, `password`, `cpassword`)
    VALUES (NULL, '$fname','$lname','$email','$username','$password','$cpassword')";

    if (mysql_query($query)) {
        // Redirect to successpage.php, and print the success message there.
        header("Location: successpage.php");
        exit();
        // echo "<script>alert('Registered Successfully')</script>";
    }
}

或者，如果你真的想留在同一个页面上，你可以使用一些查询字符串重定向到这个页面，并在收到相同的消息时显示：

if (isset($_POST['submit'])) {
    ...

    if (mysql_query($query)) {
        // Redirect to the same page, with a query string indicating success
        header("Location: thesamepage.php?success=1");
        exit();
    }
}

// Check if registration was successful
if(isset($_GET['success'])) {
    // Display the success message.
    echo "<script>alert('Registered Successfully')</script>";
}

Answer 3

我认为你的代码有点混乱。

查找

/
/ connect.php
/ (pagewithform).php
/ (scripttoregister).php

<强> connect.php

<?php

$server = "server";
$user = "user";
$pass = "pass";
$db = "db";

$connect = mysql_connect($server, $user, $pass);

if ( ! $connect ){
    echo mysql_error();
    exit;
} else{
    mysql_select_db("$db", $connect);
}

?>

创建变量，如果不是$ connect，则显示错误并退出。否则，请选择您的数据库。

_

（适用scripttoregister）.PHP     

include('connect.php');

$fname = $_POST['fname'];
$lname = $_POST['lname'];
$email = $_POST['email'];
$username = $_POST['user'];
$password = $_POST['password'];
$cpassword = $_POST['cpassword'];

if (empty($fname) or empty($lname) or empty($email) or empty($username) or empty($password) or empty($cpassword){

    echo "<script>alert('Please Fill Out Blank Fields')</script>";
    exit();

} else{

$query= mysql_query("INSERT INTO form(fname, lname, email, username, password, cpassword) VALUES ('$fname','$lname','$email','$username','$password','$cpassword')");

echo "alert('Registered Successfully')"; 
}

?>

喜欢这个^

你不需要创建另一个if if只显示alert既不将NULL设置为id，也就是auto_increment。 （：现在您可以添加任何操作if(something is empty){}和else{}。

_

OOOOR如果是自助页面（您的）

if (isset($_POST['submit'])) {

    $fname = $_POST['fname'];
    $lname = $_POST['lname'];
    $email = $_POST['email'];
    $username = $_POST['user'];
    $password = $_POST['password'];
    $cpassword = $_POST['cpassword'];

    if (empty($fname) or empty($lname) or empty($email) or empty($username) or empty($password) or empty($cpassword){

        echo "<script>alert('Please Fill Out Blank Fields')</script>";
        exit();

    } else{

     $query= mysql_query("INSERT INTO form(fname, lname, email, username, password, cpassword) VALUES ('$fname','$lname','$email','$username','$password','$cpassword')");


   // Redirect to a page, 'n print the success message there. (as said John Bupit)
    header("Location: page.php");
    exit();
    // echo "<script>alert('Registered Successfully')</script>";

   }

}