Executing php inside a WordPress widget without any plugin

http://www.emanueleferonato.com/2011/04/11/executing-php-inside-a-wordpress-widget-without-any-plugin/

Implementing the Range Operator in PHP

http://www.sitepoint.com/implementing-the-range-operator-in-php/?utm_medium=email&utm_campaign=SitePoint%20PHP%20Newsletter%20%2008%20March%202016&utm_content=SitePoint%20PHP%20Newsletter%20%2008%20March%202016+Version+B+CID_7e9bb79efb7b4224dc833f91593527aa&utm_source=CampaignMonitor%20SitePoint&utm_term=Implementing%20the%20Range%20Operator%20in%20PHP

PHP's OPCache extension review

http://jpauli.github.io/2015/03/05/opcache.html

Create a custom plugin in wordpress

http://justintadlock.com/archives/2011/02/02/creating-a-custom-functions-plugin-for-end-users

http://wpcandy.com/teaches/how-to-create-a-functionality-plugin/#.Vt7skJN9634

http://code.tutsplus.com/tutorials/creating-a-custom-wordpress-registration-form-plugin--cms-20968

Handling POST Requests the WordPress Way

http://www.sitepoint.com/handling-post-requests-the-wordpress-way/

Stop Actions with jQuery .preventDefault()

http://www.sitepoint.com/stop-actions-jquery-preventdefault/

How to Integrate Bootstrap Navbar Into WordPress Theme

http://code.tutsplus.com/tutorials/how-to-integrate-bootstrap-navbar-into-wordpress-theme--wp-33410