csbeck · May 18, 2013 18:37 · May 18, 2013
diff --git a/gistfile1.txt b/gistfile1.txt
@@ -0,0 +1,78 @@
+<?php
+
+/** Add custom meta box **/
+add_action( 'add_meta_boxes', 'myplugin_add_custom_box' );
+
+// backwards compatible (before WP 3.0)
+// add_action( 'admin_init', 'myplugin_add_custom_box', 1 );
+
+/* 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() {
+    $screens = array( 'post', 'page' );
+    foreach ($screens as $screen) {
+        add_meta_box(
+            'myplugin_sectionid',
+            __( 'Custom Sub-Title Text', 'myplugin_textdomain' ),
+            'myplugin_inner_custom_box',
+            $screen
+        );
+    }
+}
+
+/* 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
+  // Use get_post_meta to retrieve an existing value from the database and use the value for the form
+  $value = get_post_meta( $post->ID, 'subtitle_text', true );
+  echo '<label for="myplugin_new_field">';
+       _e("Please enter the custom text that follows the page title.", 'myplugin_textdomain' );
+  echo '</label> ';
+  echo '<input type="text" id="myplugin_new_field" name="myplugin_new_field" value="'.esc_attr($value).'" size="80" />';
+}
+
+/* When the post is saved, saves our custom data */
+function myplugin_save_postdata( $post_id ) {
+
+  // First we need to check if the current user is authorised to do this action. 
+  if ( 'page' == $_POST['post_type'] ) {
+    if ( ! current_user_can( 'edit_page', $post_id ) )
+        return;
+  } else {
+    if ( ! current_user_can( 'edit_post', $post_id ) )
+        return;
+  }
+
+  // Secondly we need to check if the user intended to change this value.
+  if ( ! isset( $_POST['myplugin_noncename'] ) || ! wp_verify_nonce( $_POST['myplugin_noncename'], plugin_basename( __FILE__ ) ) )
+      return;
+
+  // Thirdly we can save the value to the database
+
+  //if saving in a custom table, get post_ID
+  $post_ID = $_POST['post_ID'];
+  //sanitize user input
+  $mydata = sanitize_text_field( $_POST['myplugin_new_field'] );
+
+   // Do something with $mydata 
+   update_post_meta($post_ID, 'subtitle_text', $mydata);
+}
+
+/**
+* @author Brad Dalton - WP Sites
+*
+* @link http://wpsites.net/web-design/code-snippets-for-adding-custom-functions/
+*/
+add_action( 'genesis_after_post_title', 'custom_field_before_content' );
+function custom_field_before_content() {
+if(is_page() || is_single() ) {
+  genesis_custom_field('subtitle_text');
+  }
+}
+