Как получить чёрный пояс по WordPress? v2.0

Как получить чёрный пояс
по WordPress?
v. 2.0
Евгений Котельницкий
Kharkiv WordPress, 2016

Евгений Котельницкий
+YevhenKotelnytskyi
@yeeevhen
http://4coder.info/me

План
1. С чего мы начинали?
2. Что определяет уровень разработчика?
3. Через что проходит WP разработчик?
4. Что дальше?

Делаем первые шаги

Шаг 1 - Регестрируем блог на WP.com

Шаг 2 - Поднимаем WP на Shared-хостинге

Шаг 3 - Устанавливаем темы

Шаг 4 - Вносим правки в тему

Шаг 5 - Устанавливаем плагины

Шаг 6 - Изучаем админку

WordPress User Roles
User Roles
● Super Admin – site network administration;
● Administrator – administration features within a single site;
● Editor – can publish and manage posts of other users;
● Author – can publish and manage their own posts;
● Contributor – can write posts but cannot publish them;
● Subscriber – can only manage their profile.

Первый пояс есть!

Начинаем создавать темы осмысленно
Знакомимся с теорией:
● http://codex.wordpress.org/Theme_Development
● http://codex.wordpress.org/Template_Hierarchy
● http://codex.wordpress.org/Conditional_Tags
● ...

Post Types
Стандартные и пользовательские типы контента
● Post (post type: 'post')
● Page (post type: 'page')
● Attachment (post type: 'attachment')
● Revision (post type: 'revision')
● Navigation menu (post type: 'nav_menu_item')
● Custom Post Type (CPT): register_post_type()

Taxonomies
Стандартная и пользовательская систематика
● Category (taxonomy: 'category')
● Tag (taxonomy: 'post_tag')
● Link Category (taxonomy: 'link_category')
● Post Formats (taxonomy: 'post_format')
● Custom Taxonomies: register_taxonomy()

Data Access API
Получаем доступ к данным
● WP_Query
● WP_Tax_Query
● WP_User_Query
● get_posts ()
● get_terms ()
● get_option ()
● get_post_meta ()
● get_user_meta ()
● ...

Второй пояс получен!

Database Structure
Получаем прямой доступ к данным

Direct Database Access abstraction
<?php
global $wpdb;
$wpdb->query(
$wpdb->prepare(
"DELETE FROM $wpdb->postmeta
WHERE post_id = %d
AND meta_key = %s",
13, 'gargle' ) );
?>

/**
* WordPress Database Access Abstraction
*/
class wpdb {
public function prepare( $query, $args );
public function show_errors( $show = true );
public function query( $query );
public function get_results( $query = null, $output = OBJECT ) {
public function get_row( $query = null, $output = OBJECT, $y = 0 );
public function get_col( $query = null , $x = 0 );
public function get_var( $query = null, $x = 0, $y = 0 );
public function update( $table, $data, $where, $format = null, $where_format = null );
...
Direct Database Access abstraction

Система хуков
<?php
do_action( $tag, $arg_a, $arg_b, $etc );
add_action( $tag, $function_to_add, $priority = 10, $accepted_args = 1 );
?>
<?php
apply_filters( $tag, $value );
add_filter( $tag, $function_to_add, $priority, $accepted_args );
?>
Actions
Filters

Достигнут новый пояс!

Source Code Management Systems

Стандарты кодирования
PHP Coding Standards
HTML Coding Standards
CSS Coding Standards
JavaScript Standards

Localization
<?php
load_textdomain( $domain, $mofile );
load_plugin_textdomain( $domain, $abs_rel_path, $plugin_rel_path );
?>
<?php
$translated = __( 'Hello World!', 'domain' );
?>
<?php _e( 'Hello World!', 'domain' ) ?>

Localization & JS
<?php
// Register the script first
wp_register_script( 'some_handle', 'path/to/myscript.js' );
// Now we can localize the script with our data
$translation = array(
'some_str' => __( 'Some string', 'domain' ),
'a_value' => '10'
);
wp_localize_script( 'handle', 'object_name', $translation );
// The script can be enqueued now or later
wp_enqueue_script( 'handle' );

WP Network
<?php
switch_to_blog( $blog_id );
// Do something
restore_current_blog();
?>

Network Database
● wp_blogs
● wp_blog_versions
● wp_registration_log
● wp_signups
● wp_site
● wp_sitemeta

Super Admin capabilities
● manage_network
● manage_sites
● manage_network_users
● manage_network_plugins
● manage_network_themes
● manage_network_options
● ...
Subscriber capabilities
● read

class WP_Roles {
/**
* Add role name with capabilities to list.
*/
public function add_role( $role, $display_name, $capabilities = array() );
public function remove_role( $role );
/**
* Add capability to role.
*/
public function add_cap( $role, $cap, $grant = true );
public function remove_cap( $role, $cap );
...

WordPress User class
class WP_User {
/**
* Add role to user.
*/
public function add_role( $role );
public function remove_role( $role );
public function set_role( $role );
/**
* Add capability and grant or deny access to capability.
*/
public function add_cap( $cap, $grant = true );
public function remove_cap( $cap );
...

class WP_User {
/**
* Whether user has capability or role name.
* @return bool True, if user has capability;
* false, if user does not have capability.
*/
public function has_cap( $cap ) {
$caps = call_user_func_array( 'map_meta_cap', $args );
...
// Must have ALL requested caps
$capabilities = apply_filters(
'user_has_cap', $this->allcaps,
$caps, $args, $this );
...
WordPress User class

Впервые задумываемся о безопасности

Коричневый пояс!

Как работает WordPress?
WordPress environment setup class
class WP {
/**
* Sets up all of the variables required by the WordPress environment.
* @param string|array $query_args Passed to {@link parse_request()}
*/
public function main($query_args = '') {
$this->init();
$this->parse_request($query_args);
$this->send_headers();
$this->query_posts();
$this->handle_404();
$this->register_globals();
do_action_ref_array( 'wp', array( &$this ) );
}
...

WP_Rewrite - “Роутинг”

class WP_Rewrite {
/**
* Retrieve the rewrite rules.
* @return array Rewrite rules.
*/
public function wp_rewrite_rules() {
$this->rules = get_option('rewrite_rules');
if ( empty($this->rules) ) {
$this->matches = 'matches';
$this->rewrite_rules();
update_option('rewrite_rules', $this->rules);
}
return $this->rules;
}
...

Rewrite Rules
<?php
$rewrite = $wp_rewrite->wp_rewrite_rules();
array(
[robots.txt$] => index.php?robots=1
[category/(.+?)/?$] => index.php?category_name=$matches[1]
[page/?([0-9]{1,})/?$] => index.php?&paged=$matches[1]
[search/(.+)/?$] => index.php?s=$matches[1]
[([0-9]{4})/?$] => index.php?year=$matches[1]
[.?.+?/attachment/([^/]+)/?$] => index.php?attachment=$matches[1]
[(.?.+?)(/[0-9]+)?/?$] => index.php?pagename=$matches[1]&page=$matches[2]
...

Rewrite Rules filters
1. apply_filters( 'post_rewrite_rules', $post_rewrite );
2. apply_filters( 'date_rewrite_rules', $date_rewrite );
3. apply_filters( 'root_rewrite_rules', $root_rewrite );
4. apply_filters( 'comments_rewrite_rules', $comments_rewrite );
5. apply_filters( 'search_rewrite_rules', $search_rewrite );
6. apply_filters( 'author_rewrite_rules', $author_rewrite );
7. apply_filters( 'page_rewrite_rules', $page_rewrite );
8. apply_filters( $permastructname . '_rewrite_rules', $rules );
9. apply_filters( 'rewrite_rules_array', $this->rules );

WP_Rewrite::add_rule ()
// http://example.com/properties/123/
add_action( 'init', '_rewrites_init' );
function _rewrites_init() {
add_rewrite_rule(
'properties/([0-9]+)/?$',
'index.php?pagename=properties&property_id=$matches[1]', 'top' );
}
add_filter( 'query_vars', '_query_vars' );
function _query_vars( $query_vars ) {
$query_vars[] = 'property_id';
return $query_vars;
}

WP_Rewrite::add_permastruct ()
<?php
class WP_Rewrite {
/**
* Add a new permalink structure.
*/
public function add_permastruct( $name, $struct, $args = array() ) {
...
$this->extra_permastructs[ $name ] = $args;
}
...
?>

WP_Rewrite::add_permastruct ()
<?php
// http://example.com/au/some-prize-category/some-competition/
$wp_rewrite->add_rewrite_tag('%competition%', '([^/]+)', 'competition=');
$wp_rewrite->add_rewrite_tag('%prize_category%', '([^/]+)', 'prize_category=');
$wp_rewrite->add_permastruct(
'competition',
'/au/%prize_category%/%competition%/',
array( 'walk_dirs' => false ));
?>

WP_Query - The Query class
WordPress environment setup class
class WP {
/**
* Sets up all of the variables required by the WordPress environment.
* @param string|array $query_args Passed to {@link parse_request()}
*/
public function main($query_args = '') {
$this->init();
$this->parse_request($query_args);
$this->send_headers();
$this->query_posts();
$this->handle_404();
$this->register_globals();
do_action_ref_array( 'wp', array( &$this ) );
}
...

The Main Query
/**
* WordPress environment setup class.
*/
class WP {
/**
* Set up the Loop based on the query variables.
*/
public function query_posts() {
global $wp_the_query;
$this->build_query_string();
$wp_the_query->query($this->query_vars);
}
...

class WP_Query {
/**
* Sets up the WordPress query by parsing query string.
* @return array List of posts.
*/
public function query( $query ) {
$this->init();
$this->query = $this->query_vars = wp_parse_args( $query );
return $this->get_posts();
}
/**
* Retrieve the posts based on query variables.
* @return array List of posts.
*/
public function get_posts() {
...
do_action_ref_array( 'pre_get_posts', array( &$this ) );
...

Query vars
/**
* Retrieve variable in the WP_Query class.
*
* @see WP_Query::get()
* @uses $wp_query
*
* @return mixed
*/
function get_query_var( $var, $default = '' ) {
global $wp_query;
return $wp_query->get( $var, $default );
}

Highload & Perfomance,
Architecture, Supportability, Usability,
UNIX/Linux CLI, Stability, Unit
Testing, Continius integration,
… Communication skills,
Time management

Как получить чёрный пояс по WordPress? v2.0

More Related Content

What's hot

Viewers also liked

Similar to Как получить чёрный пояс по WordPress? v2.0

Recently uploaded

Как получить чёрный пояс по WordPress? v2.0