PHP-MySQL INSERT查询不适用于表单操作

Question

I have a form that takes input from the user and stores it in a MySQL database when the user submits the form.

print_r('<form action="" method="post">');
  /*
    form data, input tags, etc
  */
if (isset($_POST['Submit']))
{
    $sql = "INSERT INTO table
            VALUES (...)";
    $insert_form = $conn->query($sql);
}
print_r('</form>');

Initially, the user stayed on the page when they submitted the form and everything worked fine. However, I updated the site to take the user to a new page after the form is submitted. The first line of the above code now looks like this:

print_r('<form action="next-page.php" method="post">');

I didn't think it was a significant change, but now whenever I try to Submit the form, I am taken to the next page without an insert into the database. When I remove the form action, the insert command works, and when I put it back in, it does not.

Any idea why this problem is occurring?

---

I have found a workaround using the php header function:

if ($insert_form)
    header('Location: next-page.php');

..but it feels a little sloppy. Any comments on this?

Answer 1

You can remove the if statement; Insert next line after the $insert_form.

$sql = "INSERT INTO table
            VALUES (...)";
    $insert_form = $conn->query($sql);

    header("location: next-page.php");

Answer 2

print_r is mostly used to print out an array .If you wanna write your html inside a php echo will do your job easily.Normally a form submits the data to the current page if there isn't set or no action .If there is action it will take the form value to that next php file which you have set on your action and doesn't process anything within your current page.

echo'<form action="" method="post">';

/*
  form data, input tags, etc
*/
echo'</form>';

if (isset($_POST['Submit']))
 {
  $sql = "INSERT INTO table
        VALUES (...)";
  $insert_form = $conn->query($sql);
          header("location: next.php");

 }