Find and replace custom field data in wordpress.

find_repace_custom_field_data.php

<?php
 
find_replace_custom_field_data( $post_ID = NULL, $custom_field_name = NULL, $search_for = NULL, $replace_with = NULL ) {
 
  if ( isset( $post_ID ) && isset( $custom_field_name ) ) 
    $get_ custom_field = get_post_meta( $post_ID, $custom_field_name, TRUE );
    $custom_field_new = str_replace( $search_for, $replace_with, custom_field );
    set_post_meta( $post_ID, $custom_field_new );`
  }
  
}