LITTLEBLACKDOG.COM

Posted: Mon Jun 30, 2003 8:04 am Post subject: php images

I'm trying to figure out more of these GD image library functions.

It seems like there is a way to create an image on the fly and display it in the browser without actually saving it to a file.

I was hoping this was possible but so far I can't get it working. I get a stream of some sort but it displays in random characters. I'm trying this with a png and I've put image/png into the header.

Code: Select all

$im = imagecreate($xscale, $yscale)


   or die ("Cannot initialize new GD Image Stream");





$background_color = imagecolorallocate ($im, 255, 255, 255);


$text_color = imagecolorallocate ($im, 233, 14, 91);


imagestring ($im, 1, 5, 5,  "A Simple Text String", $text_color);


imagepng ($im);

If anyone knows whether I can do this somehow or not let me know. If I have to write to a file I will but I'd rather just display on the fly if possible.

Posted: Mon Jun 30, 2003 9:22 am Post subject:

Did you put a header?

Code: Select all

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

Creating an image on the fly is possible.
I wish I had more time to look at the code you got but im at work. Maybe after...

Posted: Mon Jun 30, 2003 9:24 am Post subject:

Oops! missed the header part of your message. Embarassed

Do you have the complete image code? variables defined and such?

also, try single quotes on the text you want to display.

Code: Select all

imagestring ($im, 1, 5, 5,  'A Simple Text String', $text_color);

Posted: Mon Jun 30, 2003 9:30 am Post subject:

that is all of the code.

Code: Select all




$xscale = 1000;


$yscale = 40;





$im = imagecreate($xscale, $yscale)


or die ("Cannot initialize new GD Image Stream");





$background_color = imagecolorallocate ($im, 255, 255, 255);


$text_color = imagecolorallocate ($im, 233, 14, 91);


imagestring ($im, 1, 5, 5,  "A Simple Text String", $text_color);


imagepng ($im);

Its pretty much just a snippet from the php site if you couldn't have guessed. I had working image code from another site that wrote the images to file but unfortunately I can't get to it right now. So I'm basically trying to relearn this from scratch.

Hopefully I'll be able to figure it out just by playing with it a while.

Moderator Joined: 26 May 2001 Posts: 8155 Location: Borneo

Is this the same as the ImageMagic stuff?

Posted: Thu Jul 03, 2003 12:07 pm Post subject:

Ok well I can't figure this stupid thing out. The best I can get is displaying raw image data. Or at least what I think that is. But I can't figure out how to use imagepng($im) at all. I guess I'm going to resort to using a file.

Posted: Thu Jul 03, 2003 6:05 pm Post subject:

try this tutorial
http://www.zend.com/zend/tut/dynamic.php

i think this one will give you all you need.
http://www.phpbuilder.com/columns/rasmus19990124.php3

Posted: Thu Jul 03, 2003 7:49 pm Post subject:

excellent. thanks. I'll give those a look over the weekend and see if they help.