Creating Dynamic Graphs with PHP, MySQL and GD?

BettyB

I tried the tutorial from on the page:

http://www.phpbuilder.com/columns/nasser20030219.php3

I created the same exact tables and used the script from the example. However, it do not work. The error messages received are the following:

Warning: imagecreatefrompng(graphtemp.png) [function.imagecreatefrompng]: failed to create stream: No such file or directory in /home/ftpserver/www/homepage/student/cmpakris/image.php on line 3

Warning: imagecolorallocate(): supplied argument is not a valid Image resource in /home/ftpserver/www/homepage/student/cmpakris/image.php on line 4

Warning: imagecolorallocate(): supplied argument is not a valid Image resource in /home/ftpserver/www/homepage/student/cmpakris/image.php on line 5

Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in /home/ftpserver/www/homepage/student/cmpakris/image.php on line 9

Warning: Division by zero in /home/ftpserver/www/homepage/student/cmpakris/image.php on line 13

Warning: imagepng(): supplied argument is not a valid Image resource in /home/ftpserver/www/homepage/student/cmpakris/image.php on line 28

Could this be due to that GDLib might not be installed? ( I am using a school network and do not know the configuration)

Regards,
BettyB

pete_bisby

Possibly - create a PHP page with the following:

<?php
   phpinfo();
?>

It will bring up the current configuration of the server regarding PHP. If GD doesn't appear, it means that it wasn't included in the installation.

Get whoever did the installation to include it - all the libraries for GD can be downloaded from the Internet .... somewhere!

BettyB

Thanks, but it seems to be installed, the beneath came up when I tried phpinfo().

gd
GD Support enabled

GD Version bundled (2.0 compatible)

FreeType Support enabled

FreeType Linkage with freetype

T1Lib Support enabled

GIF Read Support enabled

JPG Support enabled

PNG Support enabled

WBMP Support enabled

Could it have something to do with that the default value for the PHP directive register_globals went from ON to OFF in PHP 4.2.0?
(For instance I have to write if($_POST["submit"]) instead of the traditional if($submit))

Thank you for help so far

BettyB

pete_bisby

Unsure - if you're using $_POST, and you're sure that your variables are being passed, then this isn't the problem.

Are you sure that graphtemp.png exists, or exists in the location you are specifying?