<?php defined( 'ABSPATH' ) or exit; // find all form posts $posts = get_posts( array( 'post_type' => 'mc4wp-form', 'post_status' => 'publish', 'numberposts' => -1, ) ); // set form message texts $message_keys = array( 'text_subscribed', 'text_error', 'text_invalid_email', 'text_already_subscribed', 'text_required_field_missing', 'text_unsubscribed', 'text_not_subscribed', ); foreach ( $posts as $post ) { $settings = get_post_meta( $post->ID, '_mc4wp_settings', true ); foreach ( $message_keys as $key ) { if ( empty( $settings[ $key ] ) ) { continue; } $message = $settings[ $key ]; // move message setting over to post meta update_post_meta( $post->ID, $key, $message ); unset( $settings[ $key ] ); } // update post meta with unset message keys update_post_meta( $post->ID, '_mc4wp_settings', $settings ); }