Custom post types, fields, and meta boxes all offer powerful ways to transform WordPress sites, but when you use all three together, the impossible becomes possible. In this talk I’ll explore just how custom you can go by combining WordPress’ custom functions to solve a real-world problem. I’ll also cover custom taxonomies, custom templates, and leveraging some basic PHP, featured images, and existing plugin functionality to take your custom post type even further.

1. COMBINING CUSTOM
POST TYPES, FIELDS,
AND META BOXES TO
DO THE IMPOSSIBLE
WITH WORDPRESS

10. function create_custom_post_type() {
register_post_type( 'sem_event', everything else );
}

11. array(
'labels' => array( 'name' => __( 'Events', 'SEM' ), ...),
'rewrite' => array( 'slug' => 'event'),
'has_archive' => 'events',
'supports' => array( 'title', 'editor', 'thumbnail', 'custom-
fields')
)

12. add_action( 'init', 'create_custom_post_type' );

13. function create_custom_taxonomy() {
register_taxonomy( 'special-event-category', everything
else)
}

14. 'hierarchical' => true
'hierarchical' => false

15. add_action( 'init', 'create_custom_taxonomy' );
add_action( 'init', 'create_custom_post_type' );

16. register_post_type(
'taxonomies' => array('special-event-category', 'special-
event-tag')
)

20. function create_custom_meta_box() {
add_meta_box('special_event_meta', 'Event Date &
Time', 'render_special_event_meta_box', 'sem_event',
'side', 'high');
}

21. function render_special_event_meta_box() {
require_once plugin_dir_path( __FILE__ ) .
'partials/special-event-manager-admin-display.php';
}

22. <li>
<label>Start Date</label>
<input name="sem_events_startdate" id="startPicker" value="<?php echo
</li>
<li>
<label>Start Time</label>
<input name="sem_events_starttime" value="<?php echo $clean_st; ?>"
</li>
Start Date Sat, Jul 4th, 2015
Start Time 2:00 pm

23. wp_create_nonce
echo '<input type="hidden" name="SEM-events-nonce" id="SEM-events-nonce"
wp_create_nonce( 'SEM-events-nonce' ) . '">';

24. $custom = get_post_custom($post->ID);
isset($custom["sem_events_startdate"][0]) ?

25. MON, JUN 29TH, 2015
date("D, M d, Y", the date);
2:31 PM
get_option('time_format');
date($time_format, the date);

26. function custom_meta_box_save() {
if ( !wp_verify_nonce( $_POST['SEM-events-nonce'], 'SEM-
events-nonce' )) { return $post->ID; }
if ( !current_user_can( 'edit_post', $post->ID )) return
$post->ID;
}

27. function custom_meta_box_save() {
if(!isset($_POST["sem_events_startdate"])):
return $post;
endif;
$updatestartdate = strtotime (
$_POST["sem_events_startdate"] .
$_POST["sem_events_starttime"] );
update_post_meta($post->ID, "sem_events_startdate",
$updatestartdate );
}

28. add_action( 'add_meta_boxes', 'create_custom_meta_box'
);
add_action( 'save_post', 'custom_meta_box_save' );

30. wp_enqueue_script( 'moment', plugin_dir_url( __FILE__ ) .
'js/moment.js', array( ), 1.0, false );
wp_enqueue_script( 'pikaday', plugin_dir_url( __FILE__ ) .
'js/pikaday.js', array( 'moment' ), 1.0, false );
wp_enqueue_script( special-event-manager, plugin_dir_url(
__FILE__ ) . 'js/special-event-manager-admin.js', array(
'pikaday' ), 1.0, false );

31. wp_enqueue_style( special-events-manager, plugin_dir_url(
__FILE__ ) . 'css/special-event-manager-admin.css', array(),
1.0, 'all' );
wp_enqueue_style( 'pikadaycss', plugin_dir_url( __FILE__ ) .
'css/pikaday.css', array(), 1.0, 'all' );

33. single-sem_event.php
single.php
index.php

34. $custom_fields = get_post_custom($post_id);
the date = $custom_fields["sem_events_startdate"][0];
the formatted date = date("D, M d, Y", the date);

35. if there's no end date or time, then { July 4th at 2pm
} else if there is an end time, but start date = end date {
July 4th from 2pm - 3pm
} else if start date != end date {
July 4th at 2pm to July 5th at 5pm }

36. $src = wp_get_attachment_image_src(
get_post_thumbnail_id($post->ID), array( 250,255 ), false, ''
);
<img src="<?php $src[0] ?>">
<div style="background:url('<?php $src[0] ?>')"></div>

37. $today6am = strtotime('today 6:00') + ( get_option(
'gmt_offset' ) * 3600 );

38. if ( $post_event_time > $today6am ) {
if( function_exists( 'ninja_forms_display_form' ) ){
ninja_forms_display_form( 6 ); }
}

40. archive-sem_event.php
archive.php
index.php

41. $query->set('orderby', 'meta_value_num');
$query->set('meta_key', 'sem_events_startdate');
$query->set('order', 'ASC');

45. #WCMTL / @allilevine
git.io/semplugin