?
Solved

php insert from form

Posted on 2014-04-22
5
Medium Priority
?
472 Views
Last Modified: 2014-04-22
If I'm inserting data into a database through php. Is there any way the users doesn't have to full out all the form fields?

Why can't I just assign to 0 so if it's left empty it will insert a 0. However when I do that I get no results when it tries to update data.

      
$rent=0;
$food=0;
$gas=0;
$clothes=0;
$supplies=0;

      if (isset($_POST['submit'])){
      $rent = ($_POST["rent"]);
      $food = $_POST["food"];
      $gas = ($_POST["gas"]);
      $clothes = $_POST["clothes"];
      $supplies = $_POST["supplies"];      
}

$queryUpdate = "update january set rent=$rent, food=$food, gas=$gas, clothes=$clothes, supplies=$supplies where customerid='$id'";                              
                                                      $result = mysqli_query($connection, $queryUpdate);
                                                      if (!$result){
                                                            die("doesn't update " .
                                                            mysqli_connect_error() .
                                                            "(" . mysqli_connect_errno() . ")"
                                                            );            
                                                                        }
0
Comment
Question by:designaire
  • 3
5 Comments
 
LVL 111

Expert Comment

by:Ray Paseur
ID: 40016504
If you're new to PHP and SQL this article will help you get a foundation in how it all works.
http://www.experts-exchange.com/Programming/Languages/Scripting/PHP/A_11769-And-by-the-way-I-am-new-to-PHP.html
0
 

Author Comment

by:designaire
ID: 40016530
That doesn't answer my question.
0
 
LVL 35

Accepted Solution

by:
Terry Woods earned 420 total points
ID: 40016565
Currently, the sql is failing because syntax like this (with missing values) is invalid:
update my_table set value1 =, value2= where id=1

Open in new window


You can easily add a line to check for an empty value, and set it to 0 eg:
if (empty($rent)) {$rent = '0';}

Open in new window

If this code is exposed to the internet, or to untrusted users, then you'll also want to escape your values to prevent SQL injection attacks. In that case you should also be logging or reporting SQL errors.
0
 

Author Comment

by:designaire
ID: 40016601
if (empty($rent)) {$rent = '0';}

That will work.
0
 

Author Comment

by:designaire
ID: 40016603
The code was working, it just didn't work one of the fields weren't filled in.
0

Featured Post

Upgrade your Question Security!

Your question, your audience. Choose who sees your identity—and your question—with question security.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this series, we will discuss common questions received as a database Solutions Engineer at Percona. In this role, we speak with a wide array of MySQL and MongoDB users responsible for both extremely large and complex environments to smaller singl…
In this article, I’ll talk about multi-threaded slave statistics printed in MySQL error log file.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…
In this video, Percona Solutions Engineer Barrett Chambers discusses some of the basic syntax differences between MySQL and MongoDB. To learn more check out our webinar on MongoDB administration for MySQL DBA: https://www.percona.com/resources/we…
Suggested Courses

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question