PHP image background

[par123]

Hi,

 

I am trying to create images using imagecreatetruecolor function. It creates an image with black background by default. Now, I want to make the background transparent. I used imagecolortransparent function for that. I am trying to write a string in the image in white font. For creating the white color, I use imagecolorallocate function. When I pass the image resource of my image as an argument to this funtion, the whole image becomes white. I tried using the imagecolortransparent funtion at the end after writing the string, but it does not work. I am using Php 5.3. Can someone please help? I am too much frustrated with this now.

 

Thanks in advance!

[Bricktop]

Hi par123,

 

Post your code and we'll be able to give a more definitive answer.

 

Thanks

[par123]

Here is my code:

 

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

$im = imagecreatetruecolor(100, 100) or die("!ERROR!");

$black=imagecolorallocate($im,0,0,0);

imagecolortransparent($im,$black);

function imagestringcentered ($img,$font,$text,$color) {

while (strlen($text) * imagefontwidth($font) > imagesx($img)) {

  if ($font > 1) { $font--; }

  else { break; }

}

$cy = (imagesy($img)/2) - (imagefontheight($font)/2);

imagestring($img,$font,imagesx($img) / 2 - strlen($text) *

imagefontwidth($font) / 2,$cy,$text,$color);

}

 

$w = trim(stripslashes($_GET['w']));

if(!$w || $w == "")

        $w = "!NO DATA!";

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

imagestringcentered($im, 5, $w, $tc);

imagepng($im);

imagedestroy($im);

[par123]

I am trying to create a transparent background image with text written in the center of the image in white font. I have posted my code in the previous post. Can someone please tell me why soes the background not turn transparent? Rest all works fine. Just the backgroound does not turn transparent. I am working on it since long, but am not able to figure it out. Can someone please help?

[ozestretch]

Just of curiosity, what image file extension is it?

[par123]

It is a .png image file.

[ozestretch]

Sorry, just seen that in your code (I am not good with image manipulation). While we wait for a more knowledged response... you are not using IE6 right? That has a png/transparent deficiency that requires hacking

[par123]

Thanks for your response!

I am not using IE6. I am using Firefox 3.5 and Chrome. So thats not a problem.

[ozestretch]

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

 

is that setting the background.. the image, to white?

 

Just stabbing away till someone else can fix ya up.

[par123]

No, it does not make the background white. With the code posted, I am able to get the white font string in black background image. But I want the background to be transparent. So I tried using imagecreate function instead of imagecreatetruecolor. I know imagecreate would create an image with no background color.  I need white color for the font. So inorder to create white color, when I use imagecolorallocate, it makes the background white. There must be some other way of making the background transparent. Imagecolortransparent function too does not work.