Please help gd generated images are not displayed on screen

[matrixrp]

I have problem with gd generated images when i try to run simple script from php manual to generate image only thing that i see on screen is placeholder for image but not the image self, and as i can see images are not shown in the php manual too where the example is i really have no idea what could be the problem if anyone has experienced the same problem please help.

 

And here is the sample code from php manual:

<?php

// create a 200*200 image
$img = imagecreatetruecolor(200, 200);

// allocate some colors
$white = imagecolorallocate($img, 255, 255, 255);
$red   = imagecolorallocate($img, 255,   0,   0);
$green = imagecolorallocate($img,   0, 255,   0);
$blue  = imagecolorallocate($img,   0,   0, 255);

// draw the head
imagearc($img, 100, 100, 200, 200,  0, 360, $white);
// mouth
imagearc($img, 100, 100, 150, 150, 25, 155, $red);
// left and then the right eye
imagearc($img,  60,  75,  50,  50,  0, 360, $green);
imagearc($img, 140,  75,  50,  50,  0, 360, $blue);

// output image in the browser
header("Content-type: image/png");
imagepng($img);

// free memory
imagedestroy($img);

?> 

 

and the sample page to call this image

<img src="simpleImage.php" width="200" height="200" />

[rhodesa]

couple steps in debugging this.

 

first, load the image up directly in the URL. does it show? if it does, your img src is pointing to the wrong place. if it doesn't show right, move to the next step.

 

next, comment out these lines:

header("Content-type: image/png");
imagepng($img);

refresh the page (we are still looking directly at the image) and see if a bunch of garbage looking stuff is shown. if so, that is good, if not, you have a PHP syntax problem somewhere. if error reporting is on, you will see the syntax error here.

 

try that stuff out and report back what you find

[matrixrp]

Well i did everything you said:

Tryed to open directly in browser window but nothing showed up.

 

I commented those two lines of code

and still there is nothing in the browser and it doesn't show any errors.

 

I have no idea what could be the problem

A'm running this script on local apache 2.2  server on my computer . 

[rhodesa]

i copy/pasted the code you have and it worked fine for me. create a new php page, and put this in it:

<?php phpinfo(); ?>

load it up in a browser, scroll down to the GD section, and post what the info is there. mine for instance is:

GD Support enabled

GD Version bundled (2.0.34 compatible)

FreeType Support enabled

FreeType Linkage with freetype

FreeType Version 2.1.9

T1Lib Support enabled

GIF Read Support enabled

GIF Create Support enabled

JPG Support enabled

PNG Support enabled

WBMP Support enabled

XBM Support enabled

[matrixrp]

I've allready checked that everything is ok:

 

GD Support 	enabled
GD Version 	bundled (2.0.34 compatible)
FreeType Support 	enabled
FreeType Linkage 	with freetype
FreeType Version 	2.1.9
T1Lib Support 	enabled
GIF Read Support 	enabled
GIF Create Support 	enabled
JPG Support 	enabled
PNG Support 	enabled
WBMP Support 	enabled
XBM Support 	enabled 

 

The strange thing is that this same example is in the php manual

and after the example there is little image placeholder which should be the image from this example  but it isn't shown there either. 

[rhodesa]

what OS/Browser are you using to view the image?

 

[matrixrp]

I've tried on Mozilla, IE, Safari, Opera on the newest versions and all a get is empty page.

Is there possibility the problem to be somewhere  else, i mean problem with apache or some other system component.

[rhodesa]

it must be...the only other tip i have is to make sure there is absolutely NO extra characters (including whitespace) before or after the code. you may want to put an exit; after the imagedestroy() just to be safe. another way to test this is to write it to a file instead

imagepng($img,'testfile.png');

then try opening that file (both on the file system and through the webserver

 

p.s. - another thing i just noticed. i think the content type is supposed to have a semi-colon in it:

header("Content-type: image/png;");

[matrixrp]

Well i did everything you said and now when i open the file directly it is showing:

The image “http://localhost/gdtest.php” cannot be displayed, because it contains errors.

I've got no clue what to do but thanks for you help.

[rhodesa]

ok...that means there are PHP syntax errors...comment out the header() line:

header("Content-type: image/png");

and refresh

[matrixrp]

Now after i comment out the header when i open the page directly it is full with bunch of garbage as you said and i believe this is finally something good, but when i try to open with image tag on other page like this:

<img src="gdTest.php" width="200" height="200" />

Again the page is empty.

[willpower]

The 'garbage' contains the key!!!!

 

Take time to look thru the garbage as in there there could well be the error message.

 

[rhodesa]

there error message would either be before or after the garbage. do you have error reporting on? try putting this at the beginning of your script:

ini_set ("display_errors", "1");
error_reporting(E_ALL);

[matrixrp]

Yes i have error reporting on set in the php ini. But there is no php error

here two screenshots from this page:

 

 

[attachment deleted by admin]

[rhodesa]

not sure what else to say. i can't replicate the problem. it seems like the it's generating the code fine. have you tried the script on any other webservers?

[matrixrp]

Yes i've tried this example on public server and it runs fine,

maybe the problem is somewhere else i'll continue to struggle with this problem

but thanks again for your help.

[rhodesa]

i can't think of any other factors that would play in this. what is your webserver install?

 

-OS

-Install method (WAMP or individual components)

 

-You can always try upgrading your Apache/PHP to the latest versions...there might be some weird conflict between your specific versions. Or, if it's just for your personal use, try out WAMP (assuming you are on windows)

[matrixrp]

Well i already have the latest versions of php apache and mysql, and i'm using individual components, and my last chance is to use WAMP and see what will happen .

[rhodesa]

one other thing you may want to try (if you haven't already) is to open a fresh file in a plain text editor like Notepad (don't use Wordpad), and retype the code in there. Don't copy/paste it...retype everything. There might be some random hidden character in there hanging around from copying/pasting.

[matrixrp]

I've just installed copy of free php forum script and everything is ok all images are showing like captcha which means it is not problem with the server or php error, so now a'll try  different examples and see what happens.