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Updated Sunday, April 23rd, 2006 at 4:16pm

Checking for GD support on your server

Several of the scripts and plugins on this site use the GD library to generate verification images. If you are having problems getting a generated image to display, the first step is to make sure your server has support for the GD library in PHP. This small script will tell you if your server supports GD, and if it does, it will list the specific components. For example, some versions of PHP/GD have problems generating PNG files. You can use this script to know if you need to change the script to generate a GIF instead, or if you just do not have support at all for GD.

Live Demo

Download

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Instructions

Download the above file, rename it from .txt to .php, upload it to your server, and open it in your browser.

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    Nifty little helper for our web projects. Many Thanks!

  40. 43
    Cecilia
    3-11-11 10:37AM

    I have seen my issue has been discussed by I can’t see how it was resolved.
    When i open the php file in my browser (mozilla firefox). It says:
    ‘; echo ‘

    GD is ‘; if (function_exists(“gd_info”)) { echo ’supported by your server!
    ‘; $gd = gd_info(); foreach ($gd as $k => $v) { echo ‘
    ‘; echo ” . $k . ‘ ‘; if ($v) echo ‘Yes’; else echo ‘No’; echo ‘
    ‘; } } else { echo ‘not supported by your server!

    ‘; } echo ‘

    by dagondesign.com
    ‘; echo ”; ?>

    but I dont know what does this means!
    I want to install the contribution ‘On The Fly’ Auto Thumbnailer’ for my images but I first need to be sure that I have the ‘GD Library’.
    Thank you

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  44. 39
    Harry
    6-26-10 9:03AM

    when i open the php file in my browser (mozilla firefox). It says:

    ‘; echo ‘

    GD is ‘; if (function_exists(“gd_info”)) { echo ’supported by your server!
    ‘; $gd = gd_info(); foreach ($gd as $k => $v) { echo ‘
    ‘; echo ” . $k . ‘ ‘; if ($v) echo ‘Yes’; else echo ‘No’; echo ‘
    ‘; } } else { echo ‘not supported by your server!

    ‘; } echo ‘

    by dagondesign.com
    ‘; echo ”; ?>

    What does this mean?…i want to enable the gd library. Thanks!

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    12-19-09 11:32AM

    Thanks for the hints!

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    10-8-09 10:08AM

    Vielen Dank für diesen Vorschlag. Ich schicke Dir einen Gruß aus Deutschland.

    Thanks for the suggestion. I send you regards from Germany.

  47. 36
    Admin
    7-1-09 9:30PM

    Runf: One thing to try is making sure you are consistent with the URL options for your site in the script. If your options use ‘www.test.com’ but you are viewing the site without the ‘www.’ that can cause several verification scripts out there to not work, as the cookie used to hold the verification code things the domain is different.

  48. 35
    Runf
    3-27-09 3:45AM

    I have had the GB working at my personal site, jazzdrummer.com for quite some time now.
    I’m trying to set up a GB for a client. I’ve been having no luck with the verification. I’ve tried so many combinations of permissions and path variations that I’ve lost count.
    As a last resort, I copied my working GB to the new site, changed the paths where applicable but otherwise copied exactly the working GB files and set permissions the same as the working GB. No luck.
    Please help. It seems many people are having trouble with the validation images. GD is supported by my server btw.
    Thanks.

  49. 34
    Phil
    3-4-09 9:43AM

    Thanks, very useful, it sure would be great to have a dedicated hosting facility so we wouldn’t have to make go through channels to make those changes.

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    1-16-09 6:47PM

    win!

  51. 32
    Imran
    12-30-08 3:49AM

    Thanks, It really helped me on my new server.
    It will be good if you put some information on installing GD.

  52. 31
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    3-16-08 12:24PM

    Thanks for this little tool.

  53. 30
    Spray
    3-8-07 3:41AM

    Cool I made fully basic testing scirpt based off your tester for GD. Makes easyer for iwndows users to turn on things like curl and GD. Good work and thank you for the share!

  54. 29
    Admin
    1-16-07 9:03PM

    unknown: You may have to recompile Apache with PHP included.

  55. 28
    unknown
    1-16-07 6:40PM

    does your check GD script work for php_gd2.dll?….because i enabled it in php.ini and told php.ini where to find the dll but your test GD script says its not installed…I’ve verified that i correctly configured php.ini but still no GD according to your script.I also used php info script and GD doesn’t show up in it neither.

  56. 27
    Admin
    12-15-06 7:00PM

    Jack: I see you have verification removed right now on your form. Send me an email when you have it enabled and I will check something.

  57. 26
    Jack Tedeschi
    12-15-06 10:29AM

    formmailer_verify.php will not display verification #
    gd-test.php was run and I contacted support/ GD PNG & GIF
    are both supported, session cookies are enabled but it
    is still not working ??

  58. 25
    Admin
    11-16-06 12:46PM

    Ray: To disable verification in the formmailer script, set the veirfication field option to “” and remove the verification line from the form structure.

  59. 24
    Ray Wilson
    11-16-06 10:00AM

    I apologize, but a couple of times you mention in the website… “read above to learn how to disable GD.” and I can’t find where you have laid out those steps… For now I just deleted the line about verification. But it still gives me the error message. How can I disable GD so it stops giving me the error message at the top of the contact page… textorservice.com | contact. Thanks for your help. Great code by the way.

  60. 23
    Admin
    8-24-06 1:20PM

    george: If you do not have direct access to the server (to recompile Apache), you will just have to ask your web host to see if they can enable GD for you.

  61. 22
    george
    8-24-06 3:01AM

    hi i would like some help i have tryed the script and GD is not supported how do i get it to work thanks

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    Michele
    8-19-06 3:11AM

    Thanks, useful script!

  63. 20
    Admin
    8-16-06 3:26PM

    Terje: The non-caching code has actually already been added to the new version of my formmailer script/plugin (as well as new session code), although it is not ready for public release yet. It will also be added to the guestbook script eventually when I have time to update that one :)

  64. 19
    Terje With Lunndal
    8-16-06 3:06AM

    To avoid the verification image being cached, and thereby not changing to the user, one could add two lines of code to the start of ddbb.php:

    
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // Date in the past

  65. 18
    Terje With Lunndal
    8-16-06 2:57AM

    Everyone who are experiencing issues with displaying the verification image should first check if session cookies are enabled for the site in question. The author might want to mention this in the documentation and the script output.

  66. 17
    Admin
    8-7-06 6:37PM

    Virginia: When I go to that link I get an error – perhaps it is some sort of re-direction code in your .htaccess file? Try going to that link.

  67. 16
    Virginia
    8-7-06 1:29PM

    Yes the file is there.

  68. 15
    Admin
    8-3-06 12:50PM

    Virginia: The script on your server is looking here for the verification file:

    http://www.yukasato.net/formmailer_verify.php

    The problem is that the file is just not there. Did you upload it?

  69. 14
    Virginia
    8-3-06 10:26AM

    I have it up at http://www.yukasato.net/links.php
    Sorry it took a while to respond :)

  70. 13
    Admin
    7-26-06 4:33PM

    Virginia: There are many possible reasons :) Can I see a link? You can email it to me if you prefer.

  71. 12
    Virginia
    7-26-06 4:16PM

    I have done everything listed here successfully(gd supported, php mail works) and the image still doesn’t show up on one site I am doing(it works on my other site). Is there anything else anyone can think of as to why the image doesn’t show up?

  72. 11
    Admin
    7-3-06 9:42AM

    Matt: No. It should work fine in all browsers, unless there is another issue you are having. :) Please post this on the proper page though.

  73. 10
    Matt
    7-3-06 9:36AM

    Oops – Secure Form Mailer Plugin For Wordpress

    thanks Admin, but I just noticed that it is showing up on my work computer (Internet Explorer). I was using firefox at home when I posted, and tried reloading the page, too – are there any issues w/ the mozilla browser (CSS, etc)?

    thanks

  74. 9
    Admin
    7-3-06 9:26AM

    Matt: You are going to have to tell me what plugin/script you are trying to use. There are a few different ones that make use of the image verification. Please leave a comment on the page for the script in question. :)

  75. 8
    Matt
    7-3-06 7:14AM

    Regarding previous comment, forgot to mention I tried alt version of verify already – no dice…

  76. 7
    Matt
    7-3-06 7:09AM

    I am not seeing any verification code – uploaded the file to my server to test as you instructed and received the following.

    GD is supported by your server!
    GD Version Yes
    FreeType Support Yes
    FreeType Linkage Yes
    T1Lib Support No
    GIF Read Support Yes
    GIF Create Support Yes
    JPG Support Yes
    PNG Support Yes
    WBMP Support Yes
    XBM Support Yes
    JIS-mapped Japanese Font Support No

    by dagondesign.com

    Shows just like the demo file on your server… what can I do next to determine the cause of the image not showing?

    Thanks,

  77. 6
    Admin
    6-24-06 11:26AM

    Maya: You will have to contact your web host and see if they can enable sending mail through PHP. There is not much you will be able to do yourself unfortunately.

  78. 5
    Maya
    6-24-06 11:25AM

    ok i get this message:
    Warning: mail(): “sendmail_from” not set in php.ini or custom “From:” header missing in D:\hshome\chefilan\chefilan.com\blog\wp-content\plugins\test.php on line 1

    i guess it’s not supported. how can i make it work?

  79. 4
    Admin
    6-24-06 11:01AM

    Maya: Save the following code as test.php, upload it, and open it in your browser. Then check your mail :)

    <?php mail('your@email.com', 'Subject', 'Message'); ?>

    Be sure to add in your email address of course.

  80. 3
    Maya
    6-24-06 10:53AM

    what can i do to check that?

  81. 2
    Admin
    6-24-06 10:25AM

    Maya: I have not seen this happen before, but after a bit of searching, it looks like it is usually caused by PHP not being configured to send mail. Do you know if your server supports the use of the mail function from PHP?

  82. 1
    Maya
    6-24-06 7:25AM

    i don’t want any verification. i removed it from the form successfully, but now when i send the message i keep getting this error:

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    about a missing header..
    any idea what this is?

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