Array Escape in WordPress. To be used with 'IN' keyword

escape_array.php

/**
 * Format Array to make useful in SQL Queries
 *
 * @param array $array Array to be escaped.
 * @return string
 */
function escape_array( $array = array() ) {
    global $wpdb;
    $escaped = array();
    foreach ( $array as $k => $v ) {
        if ( is_numeric( $v ) ) {
            $escaped[] = $wpdb->prepare( '%d', $v );
        } else {
            $escaped[] = $wpdb->prepare( '%s', $v );
        }
    }
    return implode( ',', $escaped );
}