Dig Deeper into WordPress - WD Meetup Cairo

Dig Deeper into WordPress - WD Meetup Cairo

• 1.
  Web Designers MeetupCairo - 17th November 2012 Dig Deeper into WordPress (C) 2012 Mohamed Mosaad. All Copyrights Reserved
• 2.
  Why? Have you everthought 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 CustomMeta 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