A plugin must contain a bit of meta information which tells WordPress what it is and how to handle it within your website.
A standard header is introduced below to establish your plugin’s presence.
<?php /** * Plugin Name: My Plugin Name * Plugin URI: http://mypluginuri.com/ * Description: A brief description about your plugin. * Version: 1.0 or whatever version of the plugin (pretty self explanatory) * Author: Plugin Author's Name * Author URI: Author's website * License: A "Slug" license name e.g. GPL12 */
1 Create folder under plugins folder wp-content\plugins\myplugins folder name myplugins and create index.php file
2. Add the code below
<?php
/**
* Plugin Name: Custom Music Reviews
* Plugin URI: https://tutorial101.blogspot.com/
* Description: A custom music review plugin built for example.
* Version: 1.0
* Author: Cairocoders
* Author URI: http://tutorial101.blogspot.com/
**/
// Register the Custom Music Review Post Type
function register_cpt_music_review() {
$labels = array(
'name' => _x( 'Music Reviews', 'music_review' ), //post type is called music_review url https://codex.wordpress.org/Post_Types
'singular_name' => _x( 'Music Review', 'music_review' ),
'add_new' => _x( 'Add New', 'music_review' ), //and new link wp-admin/post-new.php?post_type=music_review
'add_new_item' => _x( 'Add New Music Review', 'music_review' ),
'edit_item' => _x( 'Edit Music Review', 'music_review' ),
'new_item' => _x( 'New Music Review', 'music_review' ),
'view_item' => _x( 'View Music Review', 'music_review' ),
'search_items' => _x( 'Search Music Reviews', 'music_review' ),
'not_found' => _x( 'No music reviews found', 'music_review' ),
'not_found_in_trash' => _x( 'No music reviews found in Trash', 'music_review' ),
'parent_item_colon' => _x( 'Parent Music Review:', 'music_review' ),
'menu_name' => _x( 'Music Reviews', 'music_review' ), //left side menu edit.php?post_type=music_review
);
$args = array(
'labels' => $labels,
'hierarchical' => true,
'description' => 'Music reviews filterable by genre',
'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'trackbacks', 'custom-fields', 'comments', 'revisions', 'page-attributes' ),
'taxonomies' => array( 'genres' ),
'public' => true,
'show_ui' => true,
'show_in_menu' => true,
'menu_position' => 5,
'menu_icon' => 'dashicons-format-audio',
'show_in_nav_menus' => true,
'publicly_queryable' => true,
'exclude_from_search' => false,
'has_archive' => true,
'query_var' => true,
'can_export' => true,
'rewrite' => true,
'capability_type' => 'post'
);
register_post_type( 'music_review', $args );
}
add_action( 'init', 'register_cpt_music_review' );
//custom taxonomies to extend themes or plugins
//Register a new Taxonomy using register_taxonomy()
function genres_taxonomy() { //taxonomy is a way to group things together.
register_taxonomy( //https://codex.wordpress.org/Taxonomies
'genres', //new taxonomy called genres
'music_review', //and assigns it to our post type music_review
array(
'hierarchical' => true,
'label' => 'Genres', //edit-tags.php?taxonomy=genres&post_type=music_review
'query_var' => true,
'rewrite' => array(
'slug' => 'genre',
'with_front' => false
)
)
);
}
add_action( 'init', 'genres_taxonomy');
// Function used to automatically create Music Reviews page.
function create_music_review_pages()
{
//post status and options
$post = array(
'comment_status' => 'open',
'ping_status' => 'closed' ,
'post_date' => date('Y-m-d H:i:s'),
'post_name' => 'music_review',
'post_status' => 'publish' ,
'post_title' => 'Music Reviews',
'post_type' => 'page',
);
//insert page and save the id
$newvalue = wp_insert_post( $post, false );
//save the id in the database
update_option( 'mrpage', $newvalue );
}
// Activates function if plugin is activated
register_activation_hook( __FILE__, 'create_music_review_pages');
//Testing
//first create a new page called "Music Reviews" http://localhost/wordpress/music_review/
//Lets create an example music review and see what outputs.
