How to separate two php form submit functions

Question

I am making a simple user update page where the user can update the password and their email, but I want to do it with two separate forms, because if I use one, and sent one of the field empty, it will update it to empty in the database. (And I want the user to be able to update only email or only username).

Here is my code:

<html>
<body>

<?php

$con=mysqli_connect();
session_start();
if (!isset($_SESSION['ID'])){
    header('location:login.php');
}
//
?>

<?php

if(!isset($_POST['submit'])) {
    $con=mysqli_connect();
} else {
    if (mysqli_connect_errno()) {
        echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }
}

?>

<?php

$email = mysqli_real_escape_string($con,$_POST['Email']);
$password = mysqli_real_escape_string ($con,$_POST['Password']);
$ID = $_SESSION['ID'];
$emailErr =  $passwordErr="";

function test_input($data)
{
     $data = trim($data);
     $data = stripslashes($data);
     $data = htmlspecialchars($data);
     return $data;
}

    if ($_SERVER["REQUEST_METHOD"] == "POST")

    {                           
        if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email))
        {
            $emailErr = "Please enter a valid Email Address";
        }

        else {

            $sql="UPDATE `customer`
            SET `Email`='$email'
            WHERE `ID`='$ID'";
            $result = mysqli_query($con,$sql);




echo "Update complete!";
//header("Location: userpage.html");



 if (!mysqli_query($con,$sql))
{
  die('Error: ' . mysqli_error($con));
}
}
}

?>

   <form action=<?php echo htmlspecialchars($_SERVER["PHP_SELF"])?>  method="post"><br />

Email:<br /> <input type="text" name="Email" value="<?php echo $email;?>">
<span class="error">* <?php echo $emailErr;?></span><br /><br />
<input type="submit">
</form> 

<?php



if ($_SERVER["REQUEST_METHOD"] == "POST")

    {                   





                        if (!preg_match("/^[a-zA-Z0-9@_]*$/",$password))

                            {
                            $passwordErr = "Please enter a valid password"; 
                            }




    else {





$sql="UPDATE `customer`
SET `Password`='$password'
WHERE `ID`='$ID'";
$result = mysqli_query($con,$sql);

echo "Update complete!";
//header("Location: userpage.html");



 if (!mysqli_query($con,$sql))
{
  die('Error: ' . mysqli_error($con));
}
}
}

mysqli_close($con);



?>


<form action=<?php echo htmlspecialchars($_SERVER["PHP_SELF"])?>  method="post"><br />
Password:<br /> <input type="password" name="Password">
<span class="error">* <?php echo $passwordErr;?></span><br /><br />
<input type="submit">
</form> 




</body>
</html>

With this code if I update the second form (which is the password) I will get an error for the first one, because it executes on submit. How can I make it so that I have two forms on the same page that update different rows in the table on clicking the submit button, without redirecting to a different page? Thank you

emsoff · Accepted Answer · 2014-04-25 15:50:29Z

1

You could give each submit (or other input) a unique name, and check if it's set after POSTing

For example, give your submit button a name:

<input type="submit" name="turtle">

And in your PHP:

<?php
if(isset($_POST['turtle'])) {
    // Process the form associated with the "turtle" submit button.
} else {
    // Do the other form stuff.
}

?>

answered Apr 25, 2014 at 15:50

emsoff

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2 Comments

user3565574 Over a year ago

This seems to be the easiest way for me, as I don't wnat it to get too complicated. Thanks!!

emsoff Over a year ago

@user3565574 nooooooo problem.

Nathan Fitzgerald - Fitzgenius · Accepted Answer · 2014-04-25 16:11:46Z

Why don't you combine into one form and check if the user has entered a password?

    <?php
    $con = mysqli_connect();
    session_start();
    if (!isset($_SESSION['ID'])){
        header('location:login.php');
    }

    if (mysqli_connect_errno()) {
      echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }

    function test_input($data) {
         $data = trim($data);
         $data = stripslashes($data);
         $data = htmlspecialchars($data);
         return $data;
    }

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

        $email = mysqli_real_escape_string($_POST['Email']);
        $password = mysqli_real_escape_string($_POST['Password']);
        $ID = $_SESSION['ID'];

        // Validate Email
        if (!preg_match("/([\w\-]+\@[\w\-]+\.[\w\-]+)/",$email)) {
            $errors[] = "Please enter a valid Email Address";
        }

        // Check if the password field has been filled in
        if($password) {
            // If it has then do your regex...
            if (!preg_match("/^[a-zA-Z0-9@_]*$/",$password)) {
                $errors[] = "Please enter a valid password"; 
                $update_password = false;
            } else {
                $update_password = true;
            }       
        }   

        if(count($errors) == 0) {

            // Update Email
            $sql="UPDATE `customer`
            SET `Email`='$email'
            WHERE `ID`='$ID'";
            $result = mysqli_query($con,$sql);      

            // If the test above passed then update the password
            if($update_password) {
                $sql="UPDATE `customer`
                SET `Password`='$password'
                WHERE `ID`='$ID'";
                $result = mysqli_query($con,$sql);  
            }    

            echo 'Update Complete';
            //header("Location: userpage.html");

        }

    ?>
    <?php else: ?>
    <form action=<?php echo htmlspecialchars($_SERVER["PHP_SELF"])?>  method="post"><br />
        <?php if($errors): ?>
            <span class="error">* <?php echo explode(', ',$errors);?></span><br /><br />
        <?php endif; ?>
        Email:<br /> <input type="text" name="Email" value="<?php echo $email;?>">
        Password:<br /> <input type="password" name="Password">
        <input type="submit" name="submit">
</form>
    <?php endif; ?>

P.S I tidied up your code as it gave me a hernia.

Also this code could be made more efficient but I don't have that much time to tidy it up to much ;)

VF_ · Accepted Answer · 2014-04-25 15:50:13Z

-1

Use hidden inputs to seperate requests

OR

Use seperate files for your different forms as targets...

OR

Use jboneca's answer

answered Apr 25, 2014 at 15:50

VF_

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