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          August 9, 2016 09:02 
        
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    Snippet to register WordPress metabox
  
        
  
    
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  | <?php | |
| function wp_class_register_mb() { | |
| add_meta_box( | |
| 'wpclass-mb', // unique id | |
| esc_html__( 'WP Class Metabox', 'text-domain' ), // metabox title | |
| 'wp_class_mb_cb', // metabox callback | |
| array('post','page'), // screen name [string|array] | |
| 'side', // context | |
| 'high' // priority | |
| ); | |
| } | |
| add_action( 'add_meta_boxes', 'wp_class_register_mb' ); | |
| function wp_class_mb_cb( $post ) { | |
| $data = get_post_meta($post->ID, 'wp_class_meta_data', true); | |
| ?> | |
| <input type="text" name="wp_class_input" value="<?php echo esc_attr( $data ); ?>"> | |
| <?php | |
| } | |
| function wp_class_save_meta_data($post_id) { | |
| $data = isset( $_POST['wp_class_input'] ) ? $_POST['wp_class_input'] : ''; | |
| if ( $data ) { | |
| update_post_meta( $post_id, 'wp_class_meta_data', $data ); | |
| } | |
| } | |
| add_action( 'save_post', 'wp_class_save_meta_data' ); | 
  
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Thanks vai