Re: [Swig-user] Class not found when using c++ classes with PHP

[Shishir M. <ssm...@gm...>]

HI Olly,

Thanks so much for replying.

PHP Version : 5.2.4-2ubuntu5.1
SWIG Version : 1.3.33
Apache Version: Apache/2.2.8 (Ubuntu)

I have attached the =4 necessary files as an attachment to this email,

They are,

example.cpp
example.h
example.i
test.php

The commands I run on these are,

swig -c++ -php5 example.i
g++ -c example.cpp example_wrap.cpp `php-config --includes` -fPIC
g++ -shared example.o example_wrap.o -o example.so

mv example.so `php-config --extension-dir`

A few points,

When i use the include('example.php') directive in the test.php file, it
asks me to download the php file instead of executing the script. Hence I am
currently using dl(example.so)

Now running in the browser still gives me the same error, viz.

Fatal error: Class 'Example' not found in /var/www/test.php on line 7

And running your above mentioned script on CLI

php5 -r 'include "example.php";$v = new Example();'

gives me,

PHP Warning:  Module 'gd' already loaded in Unknown on line 0

Warning: dl(): Dynamically loaded extensions aren't enabled in
/usr/share/php/example.php on line 23

Fatal error: Call to undefined function new_Example() in
/usr/share/php/example.php on line 50

I have made sure gd is installed and the gd.so file is present in the
extension directory of PHP.

Also the php.ini files of both apache2 and CLI have the following entry,

extension = gd.so

I am pretty sure I am making some trivial mistake someplace.

Any guidance would be appreciated.

Thanks a lot,

SIncerely
--
Shishir








On Fri, Jun 6, 2008 at 7:48 AM, Olly Betts <ol...@su...> wrote:
> On 2008-05-30, Shishir Malani <ssm...@gm...> wrote:
>> Now, I have created the following files,
>
> If sending example files, it's better to send them as mime attachments
> so they can easily be saved and tried.  I'm afraid I haven't tested your
> example because I don't have the patience to cut and paste the text from
> the message to recreate the various files, and have to fix up any word
> wrap damage and other mailer mangling.
>
> It would also be helpful to tell us what versions of PHP and SWIG you
> are using.  I'm guessing some version of PHP5 since you use "-php5"
> below.
>
>> After this, I run the following commands and everything compiles
>> without any problems,
>>
>> swig -c++ -php5 example1.i
>> g++ -c example1.cpp example1_wrap.cpp `php-config --includes` -fPIC
>> c++ -shared example1.o example1_wrap.o -o example1.so
>
> I don't think this is causing you problems, but it would be better to
> compile and link with either g++ *OR* c++ (i.e. use the same one in
> both cases).
>
>> I then place the generated example1.so file in the extension directory
>> of php using
>>
>> mv example.so `php-config --extension-dir`
>
> Do you mean "example1.so" here?  That's what you compiled above and try
> to load below.
>
>> And also place it in the apache www root along with the php test script.
>>
>> The php test script is defined below,
>>
>><?php
>>
>> echo dl('example1.so');
>>
>> $v = new Example1();
>>
>> $v->get_val(1,2,3);
>>
>> echo $v->sum();
>>
>> ?>
>
> (As you seem to have realised from your follow-up email) you need the
> PHP wrapper to be included:
>
> include 'example1.php';
>
> This will dl the shared object for you if it isn't already loaded, so
> you don't need to do that yourself.
>
>> Fatal error: Class 'Example1' not found in /var/www/test.php on line 3
>> php.ini file has dynamic loading enabled because I ran everything with
>> a simple C file and it worked perfectly. I get the same error as above
>> when I try using structures as well.
>
> Sounds like php failed to load example1.so.
>
> Try this from CLI php:
>
> php5 -r 'include "example1.php"; $v = new Example1();'
>
> If that works, then it's some difference in the apache environment.
>
> Look in apache's error_log for clues.  A random guess - perhaps your
> umask is very restrictive, so example1.so isn't readable by the web
> server user.
>
> Cheers,
>    Olly
>
>
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