Object-Oriented Programming in WordPress – Envato Tuts+ Code Tutorials https://code.tutsplus.com/series/object-oriented-programming-in-wordpress–cms-699
Two Ways to Develop WordPress Plugins: Object-Oriented Programming https://code.tutsplus.com/tutorials/two-ways-to-develop-wordpress-plugins-object-oriented-programming–wp-27716
Create WordPress Plugins with OOP Techniques https://code.tutsplus.com/articles/create-wordpress-plugins-with-oop-techniques–net-20153
Upgrading to PHP7 with WordPress, including fixes for major plugins – Affiliate Web Designers https://www.affiliatewebdesigners.com/2016/01/26/upgrading-to-php7-with-wordpress/
WordPress › Custom CSS Manager « WordPress Plugins http://wordpress.org/plugins/custom-css-manager-plugin/
Consolidate Options with Arrays in your WordPress Plugins | Nerdaphernalia http://striderweb.com/nerdaphernalia/2008/07/consolidate-options-with-arrays/
WordPress : Change title of sidebar widget dynamically – Stack Overflow http://stackoverflow.com/questions/6078112/wordpress-change-title-of-sidebar-widget-dynamically
php – How to add another text box to WP_Widget_Text – Stack Overflow http://stackoverflow.com/questions/9822521/how-to-add-another-text-box-to-wp-widget-text
wordpress – PHP: parent::somefunction or $this->somefunction – Stack Overflow http://stackoverflow.com/questions/3697730/php-parentsomefunction-or-this-somefunction
Building Custom WordPress Widgets | Wptuts+ http://wp.tutsplus.com/tutorials/creative-coding/building-custom-wordpress-widgets/
Creating An Options / Admin Page For Your WordPress Plugin » Return True http://return-true.com/2009/02/creating-an-options-admin-page-for-your-wordpress-plugin/
Creating Custom Options Pages in WordPress – SitePoint http://www.sitepoint.com/wordpress-options-panel/#fig_finished_product
How to make jQuery ajax (JSON) requests in WordPress | Pittsburgh Web Design & Development– Andrew M Peters http://www.andrewmpeters.com/blog/how-to-make-jquery-ajax-json-requests-in-wordpress/
Amoeba Solution Kiosk » Convert PHP array to Javascript array http://ask.amoeba.co.in/convert-php-array-to-javascript-array/
Create a WordPress Theme Options Page with the Settings API http://www.onedesigns.com/tutorials/how-to-create-a-wordpress-theme-options-page
Connecting your plugin to the WordPress Database | Create My – eCommerce and Web Design Hornsby – eCommerces and Web Design Sydney http://createmy.com.au/connecting-your-plugin-to-the-wordpress-database/