search and destroy.php

<?php
function replacer($post_type, $field, $find, $replace, $wet){
    $args = array(
        'post_type' => $post_type,
        'posts_per_page' => -1,
        'post_status' => 'any'
    );
    $the_query = new WP_Query( $args );
    if ($the_query->have_posts()) {
        while ( $the_query->have_posts() ) {
            $the_query->the_post();
            $replacement = str_replace($find, $replace, $the_query->post->{$field});
            $upsert = array(
                'ID' => $the_query->post->ID,
                $field  => $replacement
            );
            echo $the_query->post->{$field} . ' // ' . $replacement . '<br>';
            // Update the post into the database
            if($wet == true){
                wp_update_post( $upsert );
            }
        }
    }
}