How to add Query String to Permalink

Paula

I want to add a query string to my existing permalink i.e. https://example.com/hello-world to make it something like https://example.com/hello-world?foo=bar. We have some custom codes that only works if the query string existing on the given URL. I would be great if someone let me know the safe way to add query string to my permalink.

morgan

Yes, you can add the query string to the permalink by using the add_query_arg() function. The add_query_arg() accepts three arguments i.e. $key, $value and the $url.

# output - https://example.com/hello-world?foo=bar
echo add_query_arg(
    'foo',
    'bar',
    'https://example.com/hello-world'
);

Check the add_query_arg() documentation for more details - https://developer.wordpress.org/reference/functions/add_query_arg/