after_switch_theme

run after theme actived, used for migrating table after theme actived.

add_action("after_switch_theme", "mytheme_create_extra_table");

function mytheme_create_extra_table(){
    global $wpdb;

    require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );

    $sql = "CREATE TABLE wp_tesaja (
      id int(10) unsigned NOT NULL AUTO_INCREMENT,
      identifier varchar(255) NOT NULL,
      translation varchar(255) NOT NULL,
      lang varchar(5) NOT NULL,
      notes varchar(255) DEFAULT NULL,
      PRIMARY KEY  (id),
      KEY Index_2 (lang),
      KEY Index_3 (identifier)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;";

    dbDelta( $sql );
}