What version of PHP are you using?

[earlvanze]

I can't get any of the functions in wiringpi.php to work, even with the extension loaded in php.ini (which in PHP version 5.6.4 is located in:
user@system~$ php -i | grep php.ini
Configuration File (php.ini) Path => /etc/php5/cli
Loaded Configuration File => /etc/php5/cli/php.ini

user@system~$ php -v
PHP 5.6.4-4ubuntu6.4 (cli) (built: Oct 28 2015 01:56:22)
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2014 Zend Technologies

I was finally able to include('wiringpi.php') by making sure wiringpi.so extension was loaded on PHP startup via php.ini, and then commenting out the code that tries to load using dl(), but every time I call a wiringpi::[function], nothing below that line gets executed.