Dig Deeper into WordPress - WD Meetup Cairo
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Dig deeper into WordPress is a presentation made for Web Designers Meetup in Cairo taken place on 17th Dec 2012. Signup at WPMonkeys.com to get notified when awesome new WordPress related content is published.
![Custom Meta Boxes (cont.)
/*
When
the
post
is
saved,
saves
our
custom
data
*/
function
myplugin_save_postdata(
$post_id
)
{
//
verify
if
this
is
an
auto
save
routine.
//
If
it
is
our
form
has
not
been
submitted,
so
we
dont
want
to
do
anything
if
(
defined(
'DOING_AUTOSAVE'
)
&&
DOING_AUTOSAVE
)
return;
if
(
!wp_verify_nonce(
$_POST['myplugin_noncename'],
plugin_basename(
__FILE__
)
)
)
return;
//if
saving
in
a
custom
table,
get
post_ID
$post_ID
=
$_POST['post_ID'];
$mydata
=
$_POST['myplugin_new_field'];
//
Do
something
with
$mydata
//
probably
using
add_post_meta(),
update_post_meta(),
or
//
a
custom
table
(see
Further
Reading
section
below)
}
?>
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Dig Deeper into WordPress - WD Meetup Cairo
- 1. Web Designers Meetup Cairo - 17th November 2012 Dig Deeper into WordPress (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 2. Why? Have you ever thought over 70-million websites out there are using WordPress (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 4. flexi WordPress main feature is bility (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 6. Custom Post Types Custom Meta Boxes Custom Taxonomies Advanced Queries Custom Admin Panels/Options Plugin API Hooks, Actions and Filters Customizable Advanced User Capabilities + many more.... (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 7. Custom Post Types <?php register_post_type( $post_type, $args ); ?> $labels = array( 'name' => _x('Books', 'post type general name', 'your_text_domain'), 'singular_name' => _x('Book', 'post type singular name', 'your_text_domain'), 'add_new' => _x('Add New', 'book', 'your_text_domain'), 'add_new_item' => __('Add New Book', 'your_text_domain'), 'edit_item' => __('Edit Book', 'your_text_domain'), 'new_item' => __('New Book', 'your_text_domain'), 'all_items' => __('All Books', 'your_text_domain'), 'view_item' => __('View Book', 'your_text_domain'), 'search_items' => __('Search Books', 'your_text_domain'), 'not_found' => __('No books found', 'your_text_domain'), 'not_found_in_trash' => __('No books found in Trash', 'your_text_domain'), 'parent_item_colon' => '', 'menu_name' => __('Books', 'your_text_domain') ); $args = array( 'labels' => $labels, 'public' => true, 'publicly_queryable' => true, 'show_ui' => true, 'show_in_menu' => true, 'query_var' => true, 'rewrite' => array( 'slug' => _x( 'book', 'URL slug', 'your_text_domain' ) ), 'capability_type' => 'post', 'has_archive' => true, 'hierarchical' => false, 'menu_position' => null, 'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments' ) ); register_post_type('book', $args); http://codex.wordpress.org/Function_Reference/register_post_type (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 8. Custom Meta Boxes <?php add_meta_box( $id, $title, $callback, $post_type, $context, $priority, $callback_args ); ?> <?php /* Define the custom box */ add_action( 'add_meta_boxes', 'myplugin_add_custom_box' ); /* Do something with the data entered */ add_action( 'save_post', 'myplugin_save_postdata' ); /* Adds a box to the main column on the Post and Page edit screens */ function myplugin_add_custom_box() { add_meta_box( 'myplugin_sectionid', __( 'My Post Section Title', 'myplugin_textdomain' ), 'myplugin_inner_custom_box', 'post' ); } /* Prints the box content */ function myplugin_inner_custom_box( $post ) { // Use nonce for verification wp_nonce_field( plugin_basename( __FILE__ ), 'myplugin_noncename' ); // The actual fields for data entry echo '<label for="myplugin_new_field">'; _e("Description for this field", 'myplugin_textdomain' ); echo '</label> '; echo '<input type="text" id="myplugin_new_field" name="myplugin_new_field" value="whatever" size="25" />'; } .......... http://codex.wordpress.org/Function_Reference/add_meta_box (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 9. Custom Meta Boxes (cont.) /* When the post is saved, saves our custom data */ function myplugin_save_postdata( $post_id ) { // verify if this is an auto save routine. // If it is our form has not been submitted, so we dont want to do anything if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return; if ( !wp_verify_nonce( $_POST['myplugin_noncename'], plugin_basename( __FILE__ ) ) ) return; //if saving in a custom table, get post_ID $post_ID = $_POST['post_ID']; $mydata = $_POST['myplugin_new_field']; // Do something with $mydata // probably using add_post_meta(), update_post_meta(), or // a custom table (see Further Reading section below) } ?> (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 10. Custom Taxonomies <?php register_taxonomy($taxonomy, $object_type, $args); ?> // Add new taxonomy, make it hierarchical (like categories) $labels = array( 'name' => _x( 'Genres', 'taxonomy general name' ), 'singular_name' => _x( 'Genre', 'taxonomy singular name' ), 'search_items' => __( 'Search Genres' ), 'all_items' => __( 'All Genres' ), 'parent_item' => __( 'Parent Genre' ), 'parent_item_colon' => __( 'Parent Genre:' ), 'edit_item' => __( 'Edit Genre' ), 'update_item' => __( 'Update Genre' ), 'add_new_item' => __( 'Add New Genre' ), 'new_item_name' => __( 'New Genre Name' ), 'menu_name' => __( 'Genre' ), ); register_taxonomy('genre',array('book'), array( 'hierarchical' => true, 'labels' => $labels, 'show_ui' => true, 'query_var' => true, 'rewrite' => array( 'slug' => 'genre' ), )); http://codex.wordpress.org/Taxonomies (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 11. Custom Taxonomies <?php register_taxonomy($taxonomy, $object_type, $args); ?> // Add new taxonomy, NOT hierarchical (like tags) $labels = array( 'name' => _x( 'Writers', 'taxonomy general name' ), 'singular_name' => _x( 'Writer', 'taxonomy singular name' ), 'search_items' => __( 'Search Writers' ), 'popular_items' => __( 'Popular Writers' ), 'all_items' => __( 'All Writers' ), 'parent_item' => null, 'parent_item_colon' => null, 'edit_item' => __( 'Edit Writer' ), 'update_item' => __( 'Update Writer' ), 'add_new_item' => __( 'Add New Writer' ), 'new_item_name' => __( 'New Writer Name' ), 'separate_items_with_commas' => __( 'Separate writers with commas' ), 'add_or_remove_items' => __( 'Add or remove writers' ), 'choose_from_most_used' => __( 'Choose from the most used writers' ), 'menu_name' => __( 'Writers' ), ); register_taxonomy('writer','book',array( 'hierarchical' => false, 'labels' => $labels, 'show_ui' => true, 'update_count_callback' => '_update_post_term_count', 'query_var' => true, 'rewrite' => array( 'slug' => 'writer' ), )); http://codex.wordpress.org/Taxonomies (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 12. Advanced Queries <?php $the_query = new WP_Query( $args ); ?> WP_Query is a class defined in wp-includes/query.php that deals with the intricacies of a posts (or pages) request to a WordPress blog. The wp-blog-header.php (or the WP class in Version 2.0) gives the $wp_query object information defining the current request, and then $wp_query determines what type of query it's dealing with (possibly a category archive, dated archive, feed, or search), and fetches the requested posts. It retains a lot of information on the request, which can be pulled at a later date. <?php $args= array( . . ); $query= new WP_Query($args); // Loop while($query-‐>have_posts()): $query-‐>next_post(); $id = $query-‐>post-‐>ID; echo '<li>'; echo get_the_title($id); echo '</li>'; endwhile; ?> http://codex.wordpress.org/Class_Reference/WP_Query (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 13. Advanced Queries (cont.) <?php $the_query = new WP_Query( $args ); ?> Class Methods Parameters - init() - parse_query( $query ) - parse_query_vars() - get( $query_var ) - set( $query_var, $value ) - &get_posts() - next_post() - the_post() - rewind_posts() - &query( $query ) - get_queried_object() - get_queried_object_id() - WP_Query( $query = '' ) (constructor) http://codex.wordpress.org/Class_Reference/WP_Query (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 14. Advanced Queries (cont.) <?php $wpdb->get_results( MYSQLQuery ); ?> The $wpdb object can be used to read data from any table in the WordPress database, not just the standard tables that WordPress creates. $wpdb-‐>query( $wpdb-‐>prepare( " DELETE FROM $wpdb-‐>postmeta WHERE post_id = %d AND meta_key = %s ", 13, 'gargle' ) ); or $wpdb-‐>query( " UPDATE $wpdb-‐>posts SET post_parent = 7 WHERE ID = 15 AND post_status = 'static' " ); http://codex.wordpress.org/Class_Reference/wpdb (C) 2012 Mohamed Mosaad. All Copyrights Reserved
- 15. Scan My vCard wpmonkeys.com fb.com/banhawi be.net/banhawi eg.linkedin.com/in/banhawi twitter.com/banhawi www. .com ▼ ▼ http://bit.ly/Xh5EiB
- 16. Thank You § Mohamed Mosaad UX Evangelist & WordPress Expert wpmonkeys.com