I do not know how to install libpng and zlib (in Windows) for php. I have downloaded files for libpng and zlib, but I do not how to install them to be able to create images with PHP.

Martin

zlib functionality is built-in to PHP on windows. you don't need to enable any extensions. libpng is built-in to the GD library that ships with PHP. Just enable gd2.

The PHP zip-file distribution contains all the DLLs necessary to load any of the available extensions, including gd2.


Take care,

Nik
http://www.bigaction.org/

Thank You NiK for you answer,

I have this code from textbook and I still cannot see a picture.
<?php


 $height=200;
 $width=200;
 $im=imagecreate($width, $height);
 $white=imagecolorallocate($im, 255, 255, 255);
 $black=imagecolorallocate($im, 0, 0, 0);


 imagefill($im, 0,0, $black);
 imageline($im, 0, 0, $width. $height, $white);

    Header("Content-type: image/png");
 imagepng($im);
 imagedestroy($im);
?>

 I have gd2 in php instalation. and I have made extension for gd2 in php.ini accesible but if I want to see it in IE 6 I just see mark for the image (small red cross) and no image. (or I can read:
Warning: Cannot modify header information - headers already sent by (output started at E:\PHPfiles\obrazky\obr1.php:2) in E:\PHPfiles\obrazky\obr1.php on line 15)

If you have any idea what I am doing wrong please let me know.

Thanks Martin

Are you seeing any error messages? If not, look for whitespace outside of your <?php tag. Any text outside of the <?php and ?> tags are considered text output sent to the user. If PHP encounters any output, then it'll send the default HTTP headers to the client and begin sending output. Once that's done, you CANNOT send new header information, such as the Content-type.

Also, you should verify that GD is enabled by looking for it in the phpinfo() output.


Take care,

Nik
http://www.bigaction.org/

Thank you Nik,

You are right the problem was in the whitespace,

Once more thank you,

Martin