[RESOLVED] Getting an extension working in a Unix-based system?

tway

Basically I'm trying to understand how I'm supposed to install this one specific PHP extension. I've been working my way through Google search results and come across several different approaches: just modifying the php.ini, using PEAR, using .so files, etc. At this point I'm a bit lost since so far I've been only programming with the existing PHP functionalities and I've never had to install any extensions before.

Now, to the actual question: The extension I'm interested in is php_qrencode (which can be found here), which comes with the following files

config.m4
CREDITS
Doxyfile
generatedocs.pl
php_qrencode.h
qrencode.c
README

Here are also the contents of the config.m4 file, if they are necessary for coming up with an answer:

dnl $Id: config.m4,v 1.1 2007/03/29 08:58:11 vanilla Exp $
dnl config.m4 for extension qrencode

PHP_ARG_WITH(qrencode, for qrencode support,
Make sure that the comment is aligned:
[  --with-qrencode             Include qrencode support])

if test "$PHP_QRENCODE" != "no"; then
  # --with-qrencode -> check with-path
  SEARCH_PATH="/usr/local /usr"     # you might want to change this
  SEARCH_FOR="/include/qrencode.h"  # you most likely want to change this
  if test -r $PHP_QRENCODE/$SEARCH_FOR; then # path given as parameter
    QRENCODE_DIR=$PHP_QRENCODE
  else # search default path list
    AC_MSG_CHECKING([for qrencode files in default path])
    for i in $SEARCH_PATH ; do
      if test -r $i/$SEARCH_FOR; then
        QRENCODE_DIR=$i
        AC_MSG_RESULT(found in $i)
      fi
    done
  fi

  if test -z "$QRENCODE_DIR"; then
    AC_MSG_RESULT([not found])
    AC_MSG_ERROR([Please reinstall the qrencode distribution])
  fi

  PHP_ADD_INCLUDE($QRENCODE_DIR/include)

  PHP_SUBST(QRENCODE_SHARED_LIBADD)
  PHP_ADD_LIBRARY_WITH_PATH(png, $QRENCODE_DIR/lib, QRENCODE_SHARED_LIBADD)
  PHP_ADD_LIBRARY_WITH_PATH(qrencode, $QRENCODE_DIR/lib, QRENCODE_SHARED_LIBADD)
  PHP_NEW_EXTENSION(qrencode, qrencode.c, $ext_shared)
fi

The readme file doesn't cover the installation procedure, but I'm guessing that I'm going to have to do some compiling first? The PHP version I'm working with is 5.2.0-8+etch13

I would be very grateful if someone could point me to the right direction (or even provide a step-by-step guide) as to how to get this type of extension working. There is a specific piece of PHP functionality I've been looking for for a while, and it looks like this extension could be the answer, if I only figured out how to get it working 🙂

bretticus

Sure,

Here's how you build a custom php extension.

I couldn't get it to build actually however, here's what I did that may give you a head start...

First I downloaded and built the library because configure under the php extension complained about the binaries not being in the right place. I assume this needs the libs to be installed so I downloaded the source I found at:

wget http://megaui.net/fukuchi/works/qrencode/qrencode-3.0.3.tar.gz

untarred it...

tar xzvf qrencode-3.0.3.tar.gz

Installed some dependencies via apt:

sudo apt-get install pkg-config libpng12-dev

./configure
make
sudo make install

Then I went back to the source you're trying to build and ran (you may need build tools and php5-dev packages):

phpize
./configure --with-qrencode
make

However, I got a build error:

In file included from /usr/include/png.h:387,
                 from /usr/src/qrencode-0.1/qrencode.c:32:
/usr/include/pngconf.h:317: error: expected â=â, â,â, â;â, âasmâ or â__attribute__â before â.â token
/usr/include/pngconf.h:318: error: expected â=â, â,â, â;â, âasmâ or â__attribute__â before âincludeâ
/usr/src/qrencode-0.1/qrencode.c: In function âzif_qr_encodeâ:
/usr/src/qrencode-0.1/qrencode.c:119: warning: assignment makes pointer from integer without a cast
/usr/src/qrencode-0.1/qrencode.c:121: error: too few arguments to function âQRcode_encodeStringâ
make: *** [qrencode.lo] Error 1

Looks like Greek to me 🙂 Better luck!

tway

Thanks a lot for taking the time to do that, the qrencode-3.0.3. had me thrown off completely. Even though the PHP version didn't work (I guess there's some conflict between the versions of php_qrencode, libqrencode and possibly libpng12-dec), that still helped a lot. I got the C program working on the command line and saw that it can indeed do what it claims. It's still very useful for demoing purposes, and using it via CGI is always a possibility. Cheers!