[RESOLVED] imagecolormatch problem

wilku

Hello

I have a small problem here. When I try to use ImageColorMatch function from GD library, I'm getting this error:

Fatal error: Call to undefined function ImageColorMatch() in .........php on line 32

phpinfo shows that GD is present with version "2.0 or higher". The thing I read in the manual [man]imagecolormatch[/man] is that this function is only present "if PHP is compiled with the bundled version of the GD library". How do I know if this is the case? I develop on linux/kubuntu and I installed php5 and php5-gd packages via package manager. I wouldn't like to install from sources, because it is harder to manage in terms of updating, or isn't it?

Any thoughts on this?
Thanks

dagon

when you run phpinfo(), check the configure command (its in the top box), your looking for something like:

--with-gd -with-png-dir=/usr --with-jpeg-dir=/usr --with-freetype-dir=/usr'

Weedpacket

As well as what dagon notes, phpinfo() would also have a section describing the version of the installed GD library (if there is one installed).

Using PHP for six years and you still haven't found phpinfo?

To get the version information directly: the first function listed under [man]image[/man] is "[man]gd_info[/man]: Retrieve information about the currently installed GD library". Of course, that doesn't help if the library isn't installed. You can use [man]extension_loaded/man to see if the GD extension is loaded (or [man]get_loaded_extensions[/man] for a full list). But all of this information is already available in phpinfo().

wilku

I understand the subtle "after six years you should've known" 😉, but I moved to ubuntu recently and I this is my first encounter with the problem.

I don't know where the attention span ends while reading my posts 😉 As I've written earlier, the phpinfo command said that the version of gd is "2.0 or higher". Now I know it should read "bundled (2.0.34 compatible)", but how should I've known. And there aren't any configuration switches in phpinfo output on kubuntu (maybe because of suhosin patch?). But I googled some more (it took some time) and ths is what I've learned about gd:

There are two versions of gd library. The mainstream gd library and the gd library developed by php developers. The second one has some extensions (imagecolormatch is one of them) which are not ported back to the mainstream version. Linux distributions based on Debian (like Kubuntu) use the mainstream version of gd in php5-gd package. There is however a method to recompile only this package to use bundled version (or to be more exact, recompile the whole php, but install only the bundled gd package). It is described here:
http://www.howtoforge.com/recompiling-php5-with-bundled-support-for-gd-on-ubuntu
It takes some compiling time, but otherwise it works.
Thanks