Wrapping add_query_arg with esc_url not working
And the strange part: both codes echo the same string for $url!!! No, they don’t. Look at the page source. esc_url() is encoding the & control character. You can’t do that and expect the HTTP request to work correctly. Use esc_url_raw() instead. Note the description in the Codex concerning that function: The esc_url_raw() function is … Read more