Using POST to insert data into a database

Question

I need to write a code to add contacts to a database. When I run the addcontact.html form, a new line is added to my database, but the only field that has any data is the autonumber field. The rest are blank. I know there must just be an error in my code, but I cannot seem to find where it is.

Here is my insert.php

<?php
$con=mysqli_connect("localhost","root","","mycontacts");

if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$name = mysqli_real_escape_string($con, $_POST['name']);
$address = mysqli_real_escape_string($con, $_POST['address']);
$city = mysqli_real_escape_string($con, $_POST['city']);
$state = mysqli_real_escape_string($con, $_POST['state']);
$zip = mysqli_real_escape_string($con, $_POST['zip']);
$phone = mysqli_real_escape_string($con, $_POST['phone'])

$sql="INSERT INTO Contacts (contac_id, contact_name, contact_address, contact_city,          
contact_state, contact_zip_code, contact_phones, contact_website)
        VALUES ('', '$name',  '$address',  '$city',  '$state',  '$zip',     
'$phone',  '')";

if (!mysqli_query($con,$sql)) {
  die('Error: ' . mysqli_error($con));
}
header('Location:mainmenu.php');
            session_start();
            $_SESSION['loggedIn'] = true;

mysqli_close($con);


?>

And here is my code for my html form on addcontact.html:

<form action="insert.php" method='post'>
            <table width="250">
                <tr>
                    <p>
                        <td align="right" valign="middle">
                            Name:
                        </td>
                        <td align="right" valign="middle">
                            <input type="text" class= "textbox" name="name" />
                        </td>
                    </p>
                </tr>
                <tr>
                    <p>
                        <td align="right" valign="middle">
                            Address:
                        </td>
                        <td align="right" valign="middle">
                            <input type="text" class= "textbox" name="address" />
                        </td>
                    </p>
                </tr>
                <tr>
                    <p>
                        <td align="right" valign="middle">
                            City:
                        </td>
                        <td align="right" valign="middle">
                            <input type="text" class= "textbox" name="city" />
                        </td>
                    </p>
                </tr>
                <tr>
                    <p>
                        <td align="right" valign="middle">
                            State:
                        </td>
                        <td align="right" valign="middle">
                            <input type="text" class= "textbox" name="state" />
                        </td>
                    </p>
                <tr>
                    <p>
                        <td align="right" valign="middle">
                            Zip:
                        </td>
                        <td align="right" valign="middle">
                            <input type="text" class= "textbox" name="zip" maxlength='10'/>
                        </td>
                    </p>
                </tr>
                <tr>
                    <p>
                        <td align="right" valign="middle">
                            Phone
                        </td>
                        <td align="right" valign="middle">
                            <input type="text" class= "textbox" name="phone" />
                        </td>
                    </p>
                </tr>
                <tr>
                    <td colspan="2">
                        <center>
                        <br>
                        <input type='submit' class= "submitbutton" value="Submit"/>

I did echo out my $sql, and this is the error I get:

( ! ) Notice: Undefined index: name in D:\wamp\www\it665\insert.php on line 7


( ! ) Notice: Undefined index: address in D:\wamp\www\it665\insert.php on line 8


( ! ) Notice: Undefined index: city in D:\wamp\www\it665\insert.php on line 9


( ! ) Notice: Undefined index: state in D:\wamp\www\it665\insert.php on line 10


( ! ) Notice: Undefined index: zip in D:\wamp\www\it665\insert.php on line 11


( ! ) Notice: Undefined index: phone in D:\wamp\www\it665\insert.php on line 12

INSERT INTO Contacts (contac_id, contact_name, contact_address, contact_city,   
contact_state, contact_zip_code, contact_phones, contact_website) VALUES ('', '', '', 
'', '', '', '', '')

So, I then took out the echo $sql, and made sure to remove the header code so it would not forward me, and the errors still remained. So I am getting somewhere at least.

Answer 1

Undefined index: address in D:\\wamp\\www\\it665\\insert.php on line 8 means that you don't have a $_POST['address'] . You are not sending POST data that you think you are.

Do a var_dump on the $_POST array and see what's in it.

Answer 2

You can try this(if contac_id is auto increament)

$sql="INSERT INTO Contacts (contact_name, contact_address, contact_city,          
contact_state, contact_zip_code, contact_phones, contact_website)
        VALUES ('$name',  '$address',  '$city',  '$state',  '$zip',     
'$phone',  '')";

Instead of

$sql="INSERT INTO Contacts (contac_id, contact_name, contact_address, contact_city,          
contact_state, contact_zip_code, contact_phones, contact_website)
        VALUES ('', '$name',  '$address',  '$city',  '$state',  '$zip',     
'$phone',  '')";