Swt, now its so hard to comment on your site. I don’t want to comment only you know. So ma fan.

Ahahah.. but not bad la, the plugins .. got good side also kekekek..=)

very ma fan haha… but nice it works…

the security code field should higher than the submit comment button, and with proper tab order set so that user can use tab button w/o using mouse click…

hehe, thnx alot for your feedback. Will try to improve it..

very well thanx

Very nice plugin, thx!

Thanks a lot for good and simple plugin )
There was only one problem with paths in images URL.
I replaced a relative path (./wp-content) by absolute path (/wp-content).

hi there,

I like the idea of your plugin cause a blog with a nice pagerank has to block a lot of spamcomments with Akismet…

But i don’t seem to get the plugin working on our blog : http://blog.sevenedge.be

any reasons why i don’t seem to get it working?

my permalink structure is Date and name based, maybe that’s the reason why i don’t seen the image with the security code in? i only see “security code” and a field to type characters in, but no image of security code nor the refreshbutton for the code

thnx for your help

Frederiek

Get the latest version, it contain some bug fix and can work on date and name permalink

The captcha images aren’t appearing on my site because of the folder name change. :-( The image source is simple_captcha.

Sry for that part, i forget to update the SVN server with the folder. Now Its updated and it should work as it would be. Please remember to COPY the folder name “simple_captcha” inside the folder after extracting the zip archive.

Very nice plugin. Works right from the start.

Hi!

Thanks for nice plugin!
Maybe you should write about dependencies: php-gd

Hi, I noticed that your plugin fails to autopopulate multiple-line comments, if user provides an incorrect code. Reason is that \n and \r get passed through from PHP to javascript. As a quick fix, I simply did str_replace( “\n” .. and str_replace( “\r” .. and sandwiched the javascript autopopulation with try { } catch( e) { } clauses. Hope this helps someone. Good work so far.

I still don\’t understand what you mean by \"copy\" the folder – I\’m not used to that sort of thing.

Its simple, after extracting the file, copy the directory name ’simple_captcha’ to your plugin directory.

I had a problem with the image not showing up then I saw most other captcha plugins require GD php (not listed as a requiremetn for yours), once I installed that in linux it works.

Is it require GD library?

yea, it require GD library. will list it as a requirement on next release.

Fantastic plugin and so simple to install. Thank you very much :)

The image doesn\’t show. I pursued installing GD lib but eventually discoverd that it\’s already installed. PHPINFO shows a GD section indicating \"GD Support enabled\". I have Simple CAPTCHA deactivated at the moment. HELP.

Hello, For me also security most importand thing. Because i am livin in middle east and here have many terror. More over every day can dies some body. And we are using the here many security protection and metarial.

easiest and terrific tool… one quick question: how do you change the color scheme? I have blue numbers on blue background and it\’s just impossible to read.

Cheers
Dave

Yes, you can change the background image. Just go to the plugin folder where the simple captcha images reside, replace the one you wish to change with the same image type and resolution.

I have some problem with Frederiek…

i tried on localhost, it`s work with date and name based and others permalink…

but when it`s upload to my server the images is not shown.

Any idea ??

Thanks…

have you check the path to the plugin and make sure its readable? You might need to CHMOD the plugin folders to 0755

Dear Zorex,
I Currently installed Simple Captcha but he image did not shown, i’ve check there is gd library installed. what should I check next so I could show the immage ? currently disable the plugin.

pleaase check if the path to the files is ‘/wp-content/plugins/simple_captcha’ and make sure it’s readable (CHMOD 0755)

You need to logout as admin to view the CAPTCHA cause admin do not need the CAPTCHA test to post comments.

I have two servers. One with WP2.5 and other with WP2.6.
This plugin works on WP2.5. The security code does not show up in 2.6, only the edit box does. Both servers are exactly the same configuration from the same provider.

I followed your instructions… Is there something i am missing?

Please provide me a link to your blog, I can help you check

Hi all, I guess I’ve found a bug concerning the image url (as guyinwonder wrote). I have Wordpress 2.3.1 installed.

In the source of your plugin, in the file zrx_captcha.inc.php,
you call the following function several times:
bloginfo(’url’)

But, in case the blog admin gave Wordpress its own directory (as I did ) – codex.wordpress.org/Giving_WordPress_Its_Own_Directory, url of the site differs from real wordpress url and both images( code and reload button) have invalid url.

So you should instead call
bloginfo(’wpurl’)

I rewrite is this way and it works now.

Anyway, nice plugin.
Regards,
Locus.

Sorry, did not check back for replies in a while. I had found the problem after i posted. The plugin assumes the index.php is in the same folder as the rest of wordpress files. In my case, i have my blog files inside a sub-folder on the root and the index.php is on the root.

E.g. http://www.site.com will show my blog as index.php is on the root… but on my server i have placed rest of wordpress files in http://www.site.com/blog. I fixed the path in the plugin and everything was okay.

thanks for your help and for the helpful plugin.

Hi …
Thnx for ur work :)

I downloaded this plugin today and when I tried to install it I received a fatal error. It related to the zrx_captcha.inc file (line 22). After reading the above feedback, I took Locus’ suggestion and changed bloginfo(’url’) to bloginfo(’wpurl’). Once I did this, it installed correctly.

Thanks for a great plugin.

thank you very much

thank you, thank you, thank you…..
ibonette

Your site looks cool,really informative…

Thank you for this plugin! I am using at my site now. The amount of spam messages were increasing daily. Hopefully your plugin will stop that.

FYI, I use Firefox and IE on Vista. Firefox places the “Simple CAPTCHA” in the middle of the page. In IE, it works great.

Thank you once for this plugin!

Happy New Year!

Would love to use your plugin but …

“Simple CAPTCHA” activated in blog.oshana.org but captcha image is not showing in various browsers. Firewall logs show do blocks. what could be the cause and solution?

greats certanily perfect

How do I get this working?
I downloaded, upload to my plugin folder, active, but nothing????

Please help

Actually its working. You cant see it simply because you are login as admin. Admin do not need to go through the CAPTCHA test. ;D

Hi, can we make it work for those logged in as well? also, can i use it on the 2.7 version of WP? Thanks, it is beautiful! :)

very best plugin
thank u so much

Hi,
Great plugin !
It works perfectly on wordpress 2.0.2 !
Thanks for your job !

Bonjour,
Merci pour ton plugin, il fonctionne parfaitement bien sur mon site fonctionnant sous wordpress 2.0.2.
http://www.fdengineering.ch/wp

I installed the plugin and activated. But I dont see the capthea on the comments box? Any ideas?

I am not logged in as admin and still dont see it on my comment form

Hi,

I have downloaded the plug-in and installed it – but it does not seem to work!

Can you help? Advise?

Tony.

I recently came across your blog and have been reading along. I thought I would leave my first comment. I don’t know what to say except that I have enjoyed reading. Nice blog. I will keep visiting this blog very often.

Alanna

http://www.craigslisthelper.info

About Identity Theft and stolen passwords, recently I came across a site that uses Biometrics of finger, face and voice verification so the user just scans to log on. You can read more at http://www.mybiodentity.com

@Alanna: Thnx for leaving a comment. And thnx for your support as well. Hopefully my future post will interest you as well. ;D

@biometric: Thnx for sharing, the site is very informative. Too bad not everyone have fingerprint scanner (like me ;p).

lol fixed it^^ after the update you plugin created a subfolder and the files were moved to the wrong place…or was it me? Dunno.

Thx anyway for this fantastic plugin!

Installed, but couldn’t see plug-in listed in my plug-in directory. Via FTP could see that the folder was created etc.
The check did appear below comments, but couldn’t get the actual security code images to appear. Any thoughts?

This is usually because the path to the image is invalid. The path to the plugin should be “/plugins/simpleCAPTCHA/” not “plugins/simple-captcha/simpleCAPTCHA”

thanks you very mach

I’m a software developer in the Windows world, so I’m a little lost here. I have the plugin at “wp-content/plugins/simpleCAPTCHA” and permissions are set. But I get an error in zrx_captcha.inc.php on line 22:

frm.src = “/wp-content/plugins/simpleCAPTCHA/gdimg.php?re=” + count;

Since I’m lost in php, can you tell me if I should put my full url in place of the partial url listed above? WP is installed at the root of my domain, so no substituting ‘url’ with ‘wpurl’.

When I put the full url in on this line and the others that need it, I still get the error.

Thanks for your help.

Mind showing me the exact error you get? Is it a php error in the script or javascript error? There shouldn’t be any error if you don’t modify anything in the original source

Thanks for replying. I did not modify your code at all.

Actually it is solved now. I did not do a proper installation. I had the original copy of the plugin which was installed by WordPress. It was at wp-content/plugins/simple-captcha. I also had the copy that I moved to wp-content/plugins/simpleCAPTCHA. Having two copies at once was the problem. I deleted the old copy and activated it just fine.

Thanks again.

I was hoping you might be able to help me… maybe you have dealt with this issue before. I have tried to install simple captcha by uploading the folder to my plugins directory and was not able to see it in my plugins GUI to activate, so I deleted the folder and tried to use the automated wordpress installer and it also never showed up in my plugins directory. I am using version 2.7.1. Now, even though I can’t see it, there are broken image links and a field asking me for the security code… I tried putting the simpleCaptcha folder back into plugins but they do not link the images to the page (((sighs))). I was wondering if on install your plugin inserts codes into any other files, or if you know a way that I cna manually remove all bits from it. I would jsut like to go back to a straight comment form or try a fresh install. Thank you very much for taking the time.

Best regards,

C.Luft

Reply sent to your email. That should be the common problem faced by a lot of people.

Web plug in is not working on this BLOG site…
http://crmweblog.crmmastery.com/2009/05/1593/

Can you look into it…

Check the entry on top. I’ve added new guide to those facing this problem.

I installed the plugin through Dreamweaver and through the Wordpress automated install when I try to activate it, it simply disappears from my installed list in the Wordpress GUI, but in my comments section on the site it asks for a security code without providing one. Really need to get this fixed. Thanks.

reply sent to your email. For those having problem of cant see CAPTCHA img after activating, please read the updated guide above.

Fatal error: Cannot redeclare class zrx_captcha in /home/island/domains/islandchina.com/public_html/blog/wp-content/plugins/simpleCAPTCHA/zrx_captcha.inc.php on line 22

When I tried to activate this simple Capcha plugin in my new blog, the above error message appears.

How can I fix this fatal error? I have root access to my server and can change file attributes of any folder or file.

This particular captcha prevents robot spammers and people with poor eyesight from commenting.

After a bit of trouble i final got this working and it was so simple. When you upload it from wp plugins add new, it puts it in a folder /plugins/simple-captcha/SimpleCaptcha you need to remove it from the simple-captcha folder so it is in plugins/simpleCAPTCH folders only. The simple-captcha folder seems to be the problem, well it was for me anyway.

Great plugin btw :)

Brian

Rather interesting info. Thank You for it. Hope to read something more concerning that matter in your blog. And to get new version of that software.

Hi, how can i get the captcha to the right position?

i cant find im code the positioning script :(

may be i an deactivate some think im code and call the right function on the right place in template!?

Too bad there isn’t any feature build in with the plugin for you to position the captcha. Unless you add the script into your template manually and remove the original one from the plugin file. This will be a bit complicated.

note this for next update :)

maybe, if someone call a function in template, the captcha will ne on that position

noted, will try to include this into the next release.

Simple Captcha is great. Is it possible to have an option to require a Captcha for everyone, ie. not exclude registered users?

Leaving that aside. Is there a post anywhere explaining how you did this amazing theme? I love it. I’m intrigued because the background changes in size when you resize the portal. How did you do that?

Noted, will try to implement this feature into the next release if possible.

Great little plugin, but i cant use it. My wordpress installation exists in a different folder than the blog(eg. wordpress url: blah.com/wordpress, blog url: blah.com/blog ). The image makes reference only to the blog folder, not the wordpress folder. Maybe im missing some sort of configuration.

Check the above update. There is a fix to encounter this problem of yours.

You have a lot of good stuff here.This post is superb. You have a very good knowledge about this matter. Thanks for the tips!! It will be very helpful.

Got fatal error on activation: Fatal error: Cannot redeclare class zrx_captcha in /home/dadco/public_html/web2-network-marketing.com/wp-content/plugins/simpleCAPTCHA/zrx_captcha.inc.php on line 22
——–
I have 2.7.1 WP and ‘Garland Re-visited’ theme: I’m wondering if there could be problem with theme & simple Captcha?
Please advise
Darcy

You can try to change theme and see if the problem still there. Do you have older version of simpleCAPTCHA istalled? If yes, try remove the old one and its folder

Is this the old captcha. I certainly mean that 2.0 is launched?!

nop, this is still version 1. Version 2 is underway

Hi there, We use wordpress for our website however people are trying to leave a comment but it keeps saying invalid security number are you able to help.
Thanks Colin

Check the updates at the end of this post entry.

Sorry i dont understand what you mean. I can’t find the updates.
Thanks Colin

thanks you very mach

very good article. blog.zorex.info

Hi,

Hi there, We use wordpress for our website however people are trying to leave a comment but it keeps saying invalid security code are you able to help.

This has been happening since i installed this system…

Thanks for program though

If you encounter problem such as unable to view the captcha image after you’ve activated the plugin, please check the directory to the plugin files. It should be ‘plugins/simpleCAPTCHA/’.

Can I use this anywhere in my template (i.e. in header.php or any contents in my site)? Like in my own modified form, not the standard comment form? Which code should I play with? Thank you.

Fansi

the zrx_captcha.inc.php files. You go inside and you should be able to see where you can modify. You need to know some basic stuff about writing plugin for wordpress tho.

I uploaded simple_captcha into my WordPress dashboard. It says it was successfully uploaded, but when I went to activate it, it says that the plugin does not have a valid header. What does that mean and how do I correct it?

Thank you,
Kayleen Stevens

Most probably there are some conflicts btwn other plugins you installed or the theme u use. Try disable all the other plugin and use the default wordpress theme and see if the problem is solve.

Hi Zorex:

When I went to the default theme, it works. But – I have a custom theme with menu’s, headers, etc.

Is there some suggestion – where I could try to make it work with a custom theme? which files etc. would I need to look at?

You check the comment file in your theme directory. If your theme is compliance with the standard, it shouldn’t be any problem.

Thank you for your information. Good infor

If some body need more premium wordpress theme go there: premium wordpress themes

This simple capcha idea is great! Thanks for the update.

Thie simple campcta plugin is very useful. Thank you for this tip !

Thanks for the plugin! Really helps to eliminate some security issues. Keep up the good work.

excellent plugin :P Simple and effective

Hi Zorex and all

I finally got simpleCAPTCHA to work for me.
Edit the file zrx_captcha.inc.php and replace all instances of:

bloginfo(’url’)

with

bloginfo(’wpurl’)

I have my WordPress install in a sub-folder, but serve it from the DocumentRoot – bloginfo(’url’) misses out the subfolder path. bloginfo(’wpurl’) fixes it nicely.

Thanks for a great plugin.

Cheers
Brad

I think this blog is really useful and informative. Please keep up the good work it is great to read content on a blog that is not just self obsessed nonsense.
I hope I can develop a blog of this standard eventually, although I must admit I find blogging very time consuming and difficult. I wish someone would write a blog on how to produce a really interesting blog like this one.

I’m using wordpress version 2.8.4. The actual box to enter the security code is about 1/10 of the size of what it should be. Any suggestions to fix this. Thank you.

Most probably your skin template cause this problem. Try changing it with another theme and see if problem still occur?

I installed the plug in but it blocks all comments and does not have an option for a security code. Any ideas?

Check the above added content. Most probably is the theme problem.

Hi Zorex, is it possible to use this in my headers? Thank you in advance.

yea possible, but you need to do some modification to it

Hi Zorex. I just updated your great plugin on my website and i dunno why but now the captcha is located between the “your website” and “your message” in the comments page :( Any idea ? Did i make something wrong ? Thank you and keep this simple and great plugin alive.

Hi,

This has something to do with the theme you use. There are a lot of different kind of theme and the HTML source is not always the same, thats why it will have some issues when displaying the plugin.

what you can do is make some modifications to the theme u using now. You can try remove the line ‘Your website ‘ located under comments.

Well in fact this design is homemade and i used the “default folder” wordpress 2.8.4 template to make this one. I will have a look at the comments.php file. But i tried to do that yesterday and all the design wad broken :(

what you can do is move the label after the input or remove it shud be ok. I’ll try to improve this in the next version so that user can have more control on how it display

Hmm unfortunately now the captcha overrides the “message” textfield.

Well, is the previous version still availabla anywhere ? It was working fine.

Maybe you could use just a text like in the template ? and it adds your content there.

Yea, you can get it from http://wordpress.org/extend/plugins/simple-captcha/download/

click the other version link shud expand the list of older version.

Hi, I came to know your plug in from adaphobic.com. I decided to install this because of detoxboss.com. Now my concern is I can’t install your plug in, it resulted to “The plugin does not have a valid header”. Appreciate your kind tech assitance.

Can you be more specific on the error plz? Or provide a screenshot of the error?

When I activate the plug in, a pop-up message displayed: “The plugin does not have a valid header”. Thanks for replying.

what version of wordpress are you using?

The current WP v 2.8.5

I’ll look into this problem. You can try the plugin with different theme and see if problem still exists.

I appreciate you for looking into this, I’ll try with another theme but it might affect my page’ performance…

thank you very much. perfect plugin Simple CAPTCHA – My 1st Plugin for WordPress plugin

nice one, thank you very much.

Thanks for sharing this great blog with everyone:-)

Hello
I would like to know how to change the number quantity to show only 3 numbers, also to change the image size a lil bit.

I already change the sinwave, and the colors to show only black, but I cant find a solution to only show 3 numbers.

Thanks for reading my comment.

You have to edit from the gdimg file. There is a line on generating random integer and concatenate them to string.

Zorex, thank you so much sir. I didnt notice that line at the first.

Thanks for the great plugin.

you welcome.

Hello,
The image not show,I use wordpress 2.8.

Please check the extra note above, check the path. Most probably you have the wrong path

Great! This really helped me out. Thanks a lot for posting it:-) Cheers!!!!

I’m thinking about switching to drupal..Any suggestions?

How can you change the size and frequency of the letters in the captcha image

Not working for me, only black background, can your help me?

You need to edit the file that generate the image. gdimg.php

Check and see whether you have GD installed and also the path to the files are valid. Read the extra post above.

Swt, now its so hard to comment on your site. I don’t want to comment only you know. So ma fan.

For some reason this captcha is hacked. Since yesterday I am being flooded by spambots entering random usernames, websites etc, clearly an automated effort.

I’ll try changing the parameters of the gdimg.php file, maybe that’ll help. Currently Akismet is trashing all the spambots luckily :)

Can you please provide me with more info? As I know if you are using the default latest plugin, there shouldn’t be any problem. Some of the spam most probably is entered by human not bot. I’ve encounter several times before but they are usually very minimal.

the security code field should higher than the submit comment button, and with proper tab order set so that user can use tab button w/o using mouse click…

Ahahah.. but not bad la, the plugins .. got good side also kekekek..=)

If captcha is not entered, wordpress 2.9.1 displays the message “you’re a robot”, but the comment passes :-(

Excellent captcha script. Was looking for a simple solution. Thanks
Oleg

Hi,
Thank you for this awesome plugin.
I have been developing a plugin which requires captcha as well.
I wanted to ask if its fine for you if I use bunch of your code in my plugin in the backend.
I will provide you credits in my readme and installation file.
let me know.

I am getting this error when I try to install your plugin. Any suggestion?

The plugin does not have a valid header.

Marten Davis

Do you have any other CAPTCHA installed? Most probably there is some conflict with the plugin you installed.

You may refer my coding for your implementation, but I do not recommend you to copy it.

Make sure you have all the files required. And the path is correct. Read the extra post in this entry above.

Ok, I better drop my idea of captcha at all , at this time :)

@Vladimir Kiyan and everybody else running WP 2.9 and greater:

Wordpress 2.9 added the “trash bin” to the comments backend. The wp_set_comment_status() function no longer accepts the “delete” parameter, hence even if the wrong captcha is entered, the comment is still added to the database.

To make Simple Captcha work on Wordpress 2.9+, edit line 200 in zrx_captcha.inc.php from:

wp_set_comment_status($id, ‘delete’);

to:
wp_set_comment_status($id, ‘trash’);

Hope this helps.

Hey, great, simple plugin. Love it!
But: just installed in on http://www.eddyetlesvedettes.be/?page_id=97 and in Firefox works great. In Safari when you mouse click on the security code field; the cursor switches to previous field, same with message (textarea) field. Changed tabindex in zrx_captcha.inc.php ; but that doesn’t seem to help… Any ideas?

been very good about this. But contains incomplete information.

Works well but images are often very difficult or impossible to read.

hai all..

my trouble on simpleCaptcha “Check whether GD extension is loaded “my be my trouble not install php-gd for runing simpleCAPTCHA” and yum install php-gd .. it’s work simpleCAPTHA.

GREAT coding simpleCAPTCHA

qq
regards

thank you very much. its the perfect plugin for a easy CAPTCHA.

thank you very much. its the perfect plugin for a easy CAPTCHA.

thank you very much. its the perfect plugin for a easy CAPTCHA.

Hi there, I installed this plugin 2 months ago and it worked just fine until 2 days ago when all of the sudden any code I enter return an error message. I realised that the $_SESSION['secret'] is empty so the session doesnt work. No matter what I do, the session is just not working. Any ideas ?
Thanks

You have to check if your webserver have issues with session.

I am getting invalid header error on WP 2.9.2. I looked above and could not find the solution. Could you help with this? I tried to put it on 5 other different blogs and I am getting the same error on all.

I will look into this.

very nice site. Thanks to the contributors. Also very interesting and fascinating subject ..

Thank you from the service you have given

good 4 seo

Hi there,

I downloaded your simple CAPTCHA plugin and added it to my website, for preventing all the spanm I get through comments. But After activating the plugin, there still is no captcha effect on the comments. How can I make this work?

greets,
Peter Boekelaar
the Netherlands

refer to the extra post above

Thanks for the refer, but that\’s not it. I already had \’trash\’ thing done, and the path is ok too.
In fact, when I activate the simpleCAPTCHA plugin, commects cannot be inserted anymore. Visitors can enter a message, but it is not kept, not shown and it\’s not in the commects list in the dashboard. When I deactivate simpleCAPTCHA comments can be placed without any problem

I had a problem with the image not showing up then I saw most other captcha plugins require GD php (not listed as a requiremetn for yours), once I installed that in linux it works.

I appreciate you for looking into this, I’ll try with another theme but it might affect my page’ performance…

refer to the extra post above

Trying to get the captcha to work on my BLOG but it doesnt show up in the comments section.. HOW do I fix this??

check the extra note in this post

Congratulations on your site I reviewed was beautiful …

Hello.
I just extract the zip file, create wp-content/plugins at my web page (it has not been there before) and paste simpleCAPTCHA there. (path https://www….mywebpage.sk/wp-content/plugins/simpleCAPTCHA/) The problem is I cannot see SimpleCapcha in my plugin tab, so I cannot enable it! Can you please help me? how could I activate the plugin? Thanks

check the extra note posted in this entry

was a good site ..

latest version downloaded however dosen’t show on “available” list in wp dashboard?

might have issues with WordPress 3.0 and above.

This is only for wordpress??

yes, a plugin for wordpress

Is this plugin fully compatible with the WP-spamfree plugin?

I am using both at the same time and I have noticed VERY high page hits on the following three pages of my blog:

/wp-content/plugins/wp-spamfree/js/wpsf-js.php
/wp-content/plugins/simpleCAPTCHA/gdimg.php
/wp-content/plugins/wp-spamfree/img/wpsf-img.php

(WAY more than the home page or any other)

Could this be because of some kind of conflict?

Thanks,
Luke

not sure..

Is there any chance of this plugin being updated? It doesn’t work. I tested it on my own wordpress while logged out, and purposefully typed in the wrong security code and it still posted the comment.

Great plugins for WP.

hi your CAPTCHA is not working on the site listed below. it just shows a box with a red x where the captcha is suppose to be, even when you hit the refresh button for the webpage, or the button next to the captcha to reload another one, their is still a box with a red x where the captcha is supposed to be. Here is the site with the broken captcha:

http://www.xdela.com/2010/06/16/what-is-the-risk-of-taking-ecstasy-if-you-have-anxiety-and-depression/#respond

Please fix this soon? Thanks.

Currently im too busy to update the plugin.

Any chance you’ll make a version that works in WordPress 3.01?
I’d love to use it.

I tried v1.5.1b and it doesn’t even appear anywhere near the Comments box.

Yes I have activated it. :-)

i will once i’ve the time. ;P

To make Simple Captcha work on Wordpress 2.9+, edit line 200 in zrx_captcha.inc.php from:

wp_set_comment_status($id, ‘delete’);
to:
wp_set_comment_status($id, ‘trash’);

To get an image with PHP 5 edit line 33 in
gdimg.php from:

session_unregister(”secret”);
to:
unset($_SESSION['secret']);

Also do not forget to enable the GD extention in php.ini