Scratch

TheSuccessor · 2012-11-14 16:06:06

So I have a PHP program where I need to output the image as a data URI for inclusion in an <img> tag. Here's the relevant code:

Code:

...
ob_start();
imagepng($img);
$data = 'data:image/png;base64,' . base64_encode(ob_get_contents());
ob_end_clean();
...

$img has already been generated.

The code runs and outputs the data URI, but it seems the URI is invalid - the image displays as the broken image icon. Can anybody help?

jvvg · 2012-11-14 16:39:13

It should work... hmm

I have experience with data URIs on Mod Share and we use the base64_encode function. Are you sure it's a valid image?

TheSuccessor · 2012-11-15 14:16:41

jvvg wrote:
Are you sure it's a valid image?

Just checked, and it seems imagepng isn't working properly. imagegif and imagejpeg work, but imagepng won't even output a valid image straight off. However, the image output by the other two functions is just a black rectangle. Is there something wrong with my code, or the image library?

Code:

$img = imagecreatetruecolor(100, 20);
$back = imagecolorallocate($image, 255, 255, 255);
imagefill($img, 0, 0, $back);
$col = imagecolorallocate($image, 255, 0, 0);
imagestring($img, 1, 0, 0, 'test', $col);
ob_start();
imagegif($img);
$data = 'data:image/gif;base64,' . base64_encode(ob_get_contents());
ob_end_clean();
imagedestroy($img);
return $data;

joefarebrother · 2012-11-15 15:18:35

TheSuccessor wrote:
jvvg wrote:
Are you sure it's a valid image?
Just checked, and it seems imagepng isn't working properly. imagegif and imagejpeg work, but imagepng won't even output a valid image straight off. However, the image output by the other two functions is just a black rectangle. Is there something wrong with my code, or the image library?
Code:
$img = imagecreatetruecolor(100, 20);
$back = imagecolorallocate($image, 255, 255, 255);
imagefill($img, 0, 0, $back);
$col = imagecolorallocate($image, 255, 0, 0);
imagestring($img, 1, 0, 0, 'test', $col);
ob_start();
imagegif($img);
$data = 'data:image/gif;base64,' . base64_encode(ob_get_contents());
ob_end_clean();
imagedestroy($img);
return $data;

Maybe it's just a problem with the server.

GeonoTRON2000 · 2012-11-15 18:42:57

TheSuccessor wrote:
jvvg wrote:
Are you sure it's a valid image?
Just checked, and it seems imagepng isn't working properly. imagegif and imagejpeg work, but imagepng won't even output a valid image straight off. However, the image output by the other two functions is just a black rectangle. Is there something wrong with my code, or the image library?
Code:
$img = imagecreatetruecolor(100, 20);
$back = imagecolorallocate($image, 255, 255, 255);
imagefill($img, 0, 0, $back);
$col = imagecolorallocate($image, 255, 0, 0);
imagestring($img, 1, 0, 0, 'test', $col);
ob_start();
imagegif($img);
$data = 'data:image/gif;base64,' . base64_encode(ob_get_contents());
ob_end_clean();
imagedestroy($img);
return $data;

yikes Just found it. Take a closer look at line 2. You used $image instead of $img.

TheSuccessor · 2012-11-16 12:50:00

GeonoTRON2000 wrote:
Just found it. Take a closer look at line 2. You used $image instead of $img.

Derp tongue

It works now. Thanks to everyone.

Scratch

archived forums

#1 2012-11-14 16:06:06

PHP image help

Code:

#2 2012-11-14 16:39:13

Re: PHP image help

#3 2012-11-15 14:16:41

Re: PHP image help

jvvg wrote:

Code:

#4 2012-11-15 15:18:35

Re: PHP image help

TheSuccessor wrote:

jvvg wrote:

Code:

#5 2012-11-15 18:42:57

Re: PHP image help

TheSuccessor wrote:

jvvg wrote:

Code:

#6 2012-11-16 12:50:00

Re: PHP image help

GeonoTRON2000 wrote:

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