wpdb proxy using ProxyManager

versionpress.php

<?php

global $wpdb;
$factory = new \ProxyManager\Factory\AccessInterceptorValueHolderFactory();

$backupFields = array();

$prefixInterceptor = function ($proxy, wpdb $instance, $method, $params) use (&$backupFields) {
    $backupFields["last_error"] = $instance->last_error;
    $backupFields["last_query"] = $instance->last_query;
    $backupFields["last_result"] = $instance->last_result;
    $backupFields["rows_affected"] = $instance->rows_affected;
    $backupFields["num_rows"] = $instance->num_rows;
    $backupFields["insert_id"] = $instance->insert_id;
};

$createSuffixInterceptor = function ($hook) use (&$backupFields) {
    return function ($proxy, wpdb $instance, $method, $params) use (&$backupFields, $hook) {
        call_user_func_array($hook, $params);
        $instance->last_error = $backupFields["last_error"];
        $instance->last_query = $backupFields["last_query"];
        $instance->last_result = $backupFields["last_result"];
        $instance->rows_affected = $backupFields["rows_affected"];
        $instance->num_rows = $backupFields["num_rows"];
        $instance->insert_id = $backupFields["insert_id"];
    };
};

$wpdbProxy = $factory->createProxy(
    $wpdb,
    array(
        'insert' => $prefixInterceptor,
        'update' => $prefixInterceptor,
        'delete' => $prefixInterceptor,
        ),
    array(
        'insert' => $createSuffixInterceptor(function ($table, $data) {
            do_action("wpdb_after_insert", $table, $data);
        }),
        'update' => $createSuffixInterceptor(function ($table, $data, $where) {
            do_action("wpdb_after_update", $table, $data, $where);
        }),
        'delete' => $createSuffixInterceptor(function ($table, $where) {
            do_action( "wpdb_after_delete", $table, $where );
        }),
    ));

$wpdb = $wpdbProxy;