Question

Changing to register_globals OFF

Asked by: drakkarnoir

Right now my register_globals are ON, I heard this was a security risk because people could make fake passing vars in the URL and have the script think they auth'ed or something like that.


If I were to turn OFF register_globals, in my mysql_query() statements, where I use the forms names such as

INSERT INTO table (field) VALUES ($formfieldname)

would have to be

INSET INTO table (field) VALUES ($_POST[formfieldname])

?

And also,

$filetype = $_POST['filetype'];
     $_SESSION['search_filetype'] = $filetype;
     $filetype = $_SESSION['search_filetype'];

Like there, I'm trying to set the $filetype variable they want to search for as a session variable so they can go back and forth between the forms (like back and next buttons).

I'd like to know the most efficient ways of doing this, I'm fimilar with PHP now, just not with coding standards.

This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.

Subscribe now for full access to Experts Exchange and get

Instant Access to this Solution

  • Plus...
  • 30 Day FREE access, no risk, no obligation
  • Collaborate with the world's top tech experts
  • Unlimited access to our exclusive solution database
  • Never be left without tech help again

Subscribe Now

Asked On
2003-11-05 at 10:55:17ID20788997
Tags

changing

,

off

,

my

,

register_global

Topic

PHP Scripting Language

Participating Experts
2
Points
500
Comments
14

Trusted by hundreds of thousands everyday for fast, accurate and reliable tech support.

  • "The time we save is the biggest benefit of Experts Exchange to Warner Bros. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange." Mike Kapnisakis, Warner Bros.
  • "Our team likes having a resource that is more secure than just using Google and most experts using this service really know their stuff. It's nice to look here first versus using Google." Dayna Sellner, Lockheed Martin
  • "Anytime that I've been stumped with a problem, 9 out of 10 times Experts Exchange has either the accepted solution or an open discussion of the potential solution to the problem." Kenny Red, eBay Inc.

See what Experts Exchange can do for you.

Got a question?

We've got the answer.

Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.

Screenshot of Experts Exchange Knowledgebase

Need individual assistance?

Our experts are ready to help.

If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.

Screenshot of Experts Exchange Knowledgebase

Want to learn from the best?

Read articles from industry experts.

Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.

Screenshot of an Article

Working on a long term project?

Store your work and research.

Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.

Screenshot of Experts Exchange Knowledgebase

Access the answers to your technology questions today.

Subscribe Now

30-day free trial. Register in 60 seconds.

What Makes Experts Exchange Unique?

Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.

Trusted by the world's most respected brands.

image of each brand's logo

Faithfully serving IT professionals since 1996.

Experts Exchange Logo

Try it out and discover for yourself.

Subscribe Now

30-day free trial. Register in 60 seconds.

Related Solutions

    Free Tech Articles

    1. WARNING: 5 Reasons why you should NEVER fix a computer for free.
      It is in our nature to love the puzzle. We are obsessed. The lot of us. We love puzzles. We love the challenge. We thrive on finding the answer. We hate disarray. It bothers us deep in our soul. W...
    2. SCCM OSD Basic troubleshooting
      SCCM 2007 OSD is a fantastic way to deploy operating systems, however, like most things SCCM issues can sometimes be difficult to resolve due to the sheer volume of logs to sift through and the dispe...
    3. Migrate Small Business Server 2003 to Exchange 2010 and Windows 2008 R2
      This guide is intended to provide step by step instructions on how to migrate from Small Business Server 2003 to Windows 2008 R2 with Exchange 2010. For this migration to work you will need the fo...
    4. Create a Win7 Gadget
      This article shows you how to create a simple "Gadget" -- a sort of mini-application supported by Windows 7 and Vista. Gadgets can be dropped anywhere on the desktop to provide instant information, ...
    5. Outlook continually prompting for username and password
      There have been a lot of questions recently regarding Outlook prompting for a username and password whilst using Exchange 2007. There are a few reasons why this would happen and I will try to cover t...
    6. Backup Exchange 2010 Information Store using Windows Backup
      There seems to be quite a lot of confusion around the ability to backup Exchange 2010 using the built in Windows Backup feature. This stems from the omission of this feature prior to Exchange 2007 s...

    Cloud Class Webinars

    1. Avoiding Bugs in Microsoft Access
      Alison Balter takes and in-depth look at avoiding bugs in Access. In this webinar you will learn about using the immediate window to debug your applications, invoking the debugger, using breakpoints to troubleshoot, stepping through code, setting the next statement to execute, ...
    2. Top 10 Best New Features in Visio 2010
      Scott Helmers gives live demonstrations of the top 10 new features in Visio 2010. This webinar will teach you how to create compelling diagrams by adding shapes to the page with a single click, linking the shapes in a diagram to data in Excel (or SQL Server, or SharePoint), ...
    3. IT Consultant Business Secrets Revealed
      Michael Munger, Experts Exchange tech pro and IT consultant, pulls back the curtain on his very successful businesses and answers question on every IT consultant and business owner should know about. He shares secrets on what he did to solve the 5 most common problems in IT, ...
    4. Disaster Recovery and Business Continuity
      Quest CTO, Mike Billon, gives an overview of the steps involved in building a dunamic disaster recovery plan. Through case studies and an examination of software/hardware tooles for monitoring and testing, you'll gain a better understandin of where you are, where you want ...
    5. Organize Your Visio Diagrams with Containers and Lists
      Scott Helmers uses cross functional flowcharts, wireframe diagrams, data graphic legends and seating charts to teach you: how to ustilize all three new structured diagram components in Visio 2010, the best practices for organizeing shapes in previous version of Visio, how to organize ...
    6. How to Us Objects, Properties, Events and Methods in Microsoft Access
      Alison Dalter gives an in-depbth look at objects, properties, events and methods in Microsoft Access. In this webinar you will learn about using the object browser, referring to objects, working with properties and methods, working with object variables, understanding the ...

    Join the Community

    Give a Little. Get a Lot.

    Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.

    Join the Community

    Answers

     

    by: lozlozPosted on 2003-11-05 at 12:41:18ID: 9689898

    correct about the query and security risk except you need some concatenation:

    $query = "INSERT INTO table (field) VALUES ('" . $_POST["formfieldname"] . "')";

    to set the session variables all you need is $_SESSION["search_filetype"] = $filetype;

    are you wondering if a session is the best way to do this or just how to set a session variable?

    loz

     

    by: rstorey2079Posted on 2003-11-05 at 13:44:08ID: 9690320

    Just as an addition to lozloz's comment -- when you go from register globals on to off, it affects variables used in the $_GET scope as well (if you have any of those).

     

    by: drakkarnoirPosted on 2003-11-05 at 16:05:15ID: 9691057

    Well I didn't use any GET methods at all, all POST's if any...

    For loz, you said that I would have to do

    $query = "INSERT INTO table (field) VALUES ('" . $_POST["formfieldname"] . "')";

    That value string is really ugly, is there a way around this? Or do I have to do it like this with the concatnating and all...

     

    by: lozlozPosted on 2003-11-05 at 16:13:36ID: 9691085

    why does your code need to look beautiful? :p you could try

    $query = "INSERT INTO table (field) VALUES ('$_POST[formfieldname]')";

    if you want but i'm not sure if it'll work seeing as the index is a string

    loz

     

    by: drakkarnoirPosted on 2003-11-05 at 16:31:41ID: 9691179

    Index is a string? Hehe I just meant is it possible for me to do:

    $fieldname = "$_POST[formfieldname]";

    $query = "INSERT INTO TABLE (field) VALUES ($fieldname)";

    ?

     

    by: drakkarnoirPosted on 2003-11-05 at 16:56:38ID: 9691264

    And finally, how will my copy function change?

    Current I have:

    copy("filename1","filename1");

    Corresponding to filename1 in the file input from the previous form. I tried changing it to:

    copy("$_FILES[filename1]","$_FILES[filename1]");

    But it just kept giving me Array[a] ok as a result.

     

    by: lozlozPosted on 2003-11-05 at 16:58:03ID: 9691273

    oh yeh, but you should have:

    $fieldname = $_POST["formfieldname"];

    loz

     

    by: lozlozPosted on 2003-11-05 at 17:04:12ID: 9691297

    well $_FILES["filename1"] will hold an array of the information about the file

    tmp_name is the temporary name of it, name is the actual name, type is the mime type, size is its size in bytes, error is the assocatied error code

    so these are accessed through $_FILES["filename1"]["tmp_name"] etc.

    so you probably want something like:

    copy($_FILES["filename1"]["tmp_name"],"../images/" . $_FILES["filename1"]["name"]);

    you'll probably want to change the directory information for the 2nd half of the function

    loz

     

    by: drakkarnoirPosted on 2003-11-05 at 17:07:56ID: 9691310

    Why did I not have to do tmp_name before with register_globals on?

     

    by: lozlozPosted on 2003-11-05 at 17:13:14ID: 9691324

    copy("filename1","filename1");

    if that code's correct then you're simply copying the file called filename1 over itself?

    loz

     

    by: drakkarnoirPosted on 2003-11-05 at 17:29:50ID: 9691382

    Nope, I'm getting the filename1 from the upload form, and then putting it in the hosting directory as the filename1

     

    by: drakkarnoirPosted on 2003-11-05 at 17:33:33ID: 9691393

    Also, I had this before:

    $img2_name = str_replace(" ","",$img2_name);
                      $img2_name = str_replace("'","",$img2_name);
                      $img2_name = str_replace("(","",$img2_name);
                      $img2_name = str_replace(")","",$img2_name);
                      $img2_name = str_replace("\\","",$img2_name);

    That was done basically to elimate nasty characters in the filename before uploading...

    How would this change? Can I define the $_FILES[img2][name] array element?

     

    by: lozlozPosted on 2003-11-05 at 17:49:13ID: 9691440

    just add a line before as follows:

    $img2_name = $_FILES["img2"]["name"];

    and if you were getting filename1 from an upload form then that code must have been different, maybe you forgot the $ because those are just 2 strings in the copy function

    loz

     

    by: drakkarnoirPosted on 2003-11-05 at 22:24:26ID: 9692349

    Thanks so much for explaining, I was worried because I had read on the PHP.net site that it was insecure and that's why they made it default OFF.

    Rock on.

    20120131-EE-VQP-002

    3 Ways to Join

    30-Day Free Trial

    The Experts

    98% positive feedback on 31,087 answers since March 2000. angeliii is a Microsoft Most Valuable Professional for his work with MS SQL Server & Develoment.

    He has also proven his knowledge of Visual Basic Programming, PHP Scripting and Oracle Databases.

    The Experts

    97% positive feedback on 10,752 answers since July 2000. lrmoore has more than 18 years experience in the networking industry.

    The six-time Mircosoft MVPs specialties include firewalls, virtual private networking, and network management.

    Testimonials

    "...and excellent source for support... Kind of like having your very own IT dept." Electriciansnet

    Testimonials

    "I was apprehensive at signing up at first. However... it has already made my life as an IT administrator much easier." JaCrews

    Testimonials

    "WOW! You guys have great, active, and knowledgeable people on here." moore50

    Business Clients

    Business Clients

    In the Press

    "If you’ve got a question... Experts Exchange can supply an answer.”

    In the Press

    "...an invaluable aid for both IT professionals and those who require tech support."

    In the Press

    "where IT professionals provide quick answers on just about any topic"

    Business Account Plans

    Loading Advertisement...