1.
WordPress Theme
Plugins Development
Best Practices
http://tareq.weDevs.com Tareq Hasan
@tareq_cse
Software Engineer, Leevio

2.
Use WordPress Coding
Standards
http://codex.wordpress.org/WordPress_Coding_Standards

3.
Add Scripts/Styles
Intelligently ..(1)
WRONG
http://codex.wordpress.org/Function_Reference/wp_enqueue_script
http://codex.wordpress.org/Function_Reference/wp_enqueue_style

4.
Add Scripts/Styles
Intelligently ..(2)
RIGHT

5.
Use escape functions in
forms..(1)
WRONG

6.
Use escape functions in
forms..(2)
esc_attr()
esc_html()
RIGHT

7.
Use escape functions in
forms..(3)
esc_attr()
esc_url()
esc_js()
esc_html()
More validation functions
http://codex.wordpress.org/Data_Validation

8.
Prevent CSRF Attack
Use Nonces
wp_nonce_field()
http://codex.wordpress.org/WordPress_Nonces

9.
Prevent CSRF Attack
Use Nonces
wp_nonce_field()
wp_nonce_url()
wp_verify_nonce()
wp_create_nonce()
check_admin_referer()
check_ajax_referer()
http://codex.wordpress.org/WordPress_Nonces

10.
Let developers extend
your code without
touching your code
do_action()
apply_filters()
http://codex.wordpress.org/Plugin_API

11.
Ensure Theme/Plugins
generate no errors with
WP_DEBUG enabled

12.
Do not hard code
WordPress paths
$plugin_path = get_bloginfo('wpurl')."/wp-content/plugins/wp-
codebox";
WRONG
$plugin_path = plugins_url('', __FILE__);
RIGHT

13.
Use database securely..(1)
Insert
Bad
Good
http://codex.wordpress.org/Class_Reference/wpdb

14.
Use database securely..(1)
Update
Bad
Good

15.
Use database securely..(1)
Prepared Statement
Bad
Good

16.
Make your theme child
theme aware
get_template_directory_uri()
For parent theme
get_stylesheet_directory_uri()
For child theme

17.
Localization is important
load_theme_textdomain()
load_plugin_textdomain()
http://codex.wordpress.org/I18n_for_WordPress_Developers

18.
Use the settings API
Store theme and plugin
option settings efficiently
http://codex.wordpress.org/Settings_API

19.
Make your plugin
cache aware
http://codex.wordpress.org/Class_Reference/WP_Object_Cache

20.
Thanks
Questions?