“call to undefined function imagecreatetruecolor” error in PHP & pChart

Question

I am trying to integrate \"pChart\" with my PHP code. When I am trying to run the samples it gives me an error stating call to undefined function imagecreatetruecolor<

Answer 1

This answer is an update 9 years later, but PHP has changed a lot. Please upvote the St. Woland from which this is derived...

Use the following code on your web server to test if you have GD extension:

".print_r($testGD,true)."

"; //display GD function list

If you get the message that it's not installed, then check the following steps:

1. Look at the output of phpinfo() to identify your php.ini
2. Edit php.ini and enable the GD extension:
   • Newer PHP (7.3, fg):
     • extension=gd2 //uncomment
   • Older PHP (5.x, 7.0, you should upgrade):
     • extension_dir= //uncomment or add
     • extension=php_gd2.dll //uncomment or add
3. GD for 7.x may not be installed
   • (for Ubuntu like OS'es) sudo apt install php7.3-gd # replace version to yours
4. Restart web server
5. Run the test script again
6. (Remove test script when all is working, it can be a security hole)

As you can see the exact method is very version dependent. I hope this additional information can help others sort out the exact steps they might need.