Add “Post Options” for new wordpress post

2 comments

1. You must use add_meta_box function.

   Take a look to this tutorials:

   1. Using add_meta_box()
   2. Tutorial: Creating Custom Write Panels in WordPress
   3. Example How To Add Meta Boxes To Edit Area

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2. Try the following code just to get you started.

   /* Define the custom box */
   
   // WP 3.0+
   add_action( 'add_meta_boxes', 'post_options_metabox' );
   
   // backwards compatible
   add_action( 'admin_init', 'post_options_metabox', 1 );
   
   /* Do something with the data entered */
   add_action( 'save_post', 'save_post_options' );
   
   /**
    *  Adds a box to the main column on the Post edit screen
    * 
    */
   function post_options_metabox() {
       add_meta_box( 'post_options', __( 'Post Options' ), 'post_options_code', 'post', 'normal', 'high' );
   }
   
   /**
    *  Prints the box content
    */
   function post_options_code( $post ) { 
       wp_nonce_field( plugin_basename( __FILE__ ), $post->post_type . '_noncename' );
       $meta_info = get_post_meta( $post->ID, '_meta_info', true) ? get_post_meta( $post->ID, '_meta_info', true) : 1; ?>
       <h2><?php _e( 'Meta Information' ); ?></h2>
       <div class="alignleft">
           <input id="meta_default" type="radio" name="_meta_info" value="meta_default"<?php checked( 'meta_default', $meta_info ); ?><?php echo ( $meta_info == 1 )?' checked="checked"' : ''; ?> /> <label for="meta_default" class="selectit"><?php _e( 'Use default post setting' ); ?></label><br />
           <input id="show_meta" type="radio" name="_meta_info" value="show_meta"<?php checked( 'show_meta', $meta_info ); ?> /> <label for="show_meta" class="selectit"><?php _e( 'Show meta info' ); ?></label><br />
           <input id="hide_meta" type="radio" name="_meta_info" value="hide_meta"<?php checked( 'hide_meta', $meta_info ); ?> /> <label for="hide_meta" class="selectit"><?php _e( 'Hide meta info' ); ?></label><br />
       </div>
       <div class="alignright">
           <span class="description"><?php _e( 'Your explanation here' ); ?></span>
       </div>
       <div class="clear"></div>
       <hr /><?php
   }
   
   /** 
    * When the post is saved, saves our custom data 
    */
   function save_post_options( $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;
   
     // verify this came from the our screen and with proper authorization,
     // because save_post can be triggered at other times
     if ( !wp_verify_nonce( @$_POST[$_POST['post_type'] . '_noncename'], plugin_basename( __FILE__ ) ) )
         return;
   
     // Check permissions
     if ( !current_user_can( 'edit_post', $post_id ) )
        return;
   
     // OK, we're authenticated: we need to find and save the data
     if( 'post' == $_POST['post_type'] ) {
         if ( !current_user_can( 'edit_post', $post_id ) ) {
             return;
         } else {
             update_post_meta( $post_id, '_meta_info', $_POST['_meta_info'] );
         }
     } 
   
   }
   

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