Simple Hello World PHP extension could not be executed

Question

I am trying to run simple Hello World PHP extension, but after make & install extension and when I want to run test script I am experiencing following issue:

P Warning:  PHP Startup: Unable to load dynamic library '/usr/lib/php5/20121212/skeleton.so' - /usr/lib/php5/20121212/skeleton.so: undefined symbol: _ZN3Php9ExtensionD1Ev in Unknown on line 0
/etc/php5/cli/conf.d/skeleton.ini

My main.cpp file:

#include <phpcpp.h>
#include <iostream>

void helloWorld (Php::Parameters &params)
{
    std::string name=params[0];
    std::cout<<"Hello "<<name<<"!"<<std::endl;
}

extern "C" {

    PHPCPP_EXPORT void *get_module() 
    {
        static Php::Extension extension("skeleton", "1.0");
        extension.add("helloWorld", helloWorld);
        return extension;
    }
}

And here is my test script:

<?php
echo helloWorld('Ben');

I have been inspired by this tutorial: http://www.sitepoint.com/getting-started-php-extension-development-via-php-cpp/

Could you help me with this one? Thanks in advance for your help.

do you have dynamic extension enabled? Do you run the script from cli? do you see your extension loaded if you run "php -i | grep skeleton"? — klapvee
– klapvee, Commented Jun 24, 2015 at 17:13

Vinicius Pontes · Accepted Answer · 2014-12-31 20:18:52Z

1

I'm not sure if this is the problem, but you should use:

Php::out << "Hello " << name << "!" << std::endl;

instead of

std::cout << "Hello " << name << "!" << std::endl;

std::cout produces some errors in my extensions.

Vinicius

answered Dec 31, 2014 at 20:18

Vinicius Pontes

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1 Comment

Tom11 Over a year ago

Thanks, but this is not a solution, problem still persists.

Ian · Accepted Answer · 2016-01-28 14:47:51Z

0

I was getting the same error until I saw this ticket on PHP-CPP's repo: https://github.com/CopernicaMarketingSoftware/PHP-CPP/issues/180

Turns out my issue was that I followed someone else's advice that I should replace the contents of the /zend/ dir (in the PHP-CPP lib) with the contents of PHP's source code (that I got from php.net).

Once I rolled back the contents of /zend/ to be the same as what PHP-CPP provides, the problem went away.

answered Jan 28, 2016 at 14:47

Ian

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