How Do I Add Expired Headers to an External Script in WordPress?

Adding expired headers to an external script in WordPress can be done in a few different ways. The most basic way is to use the wp_headers() function.

This function takes in an array of header information, and will automatically add the appropriate expired headers to the document.

Another option is to use the add_header() function. This function takes in a single header value, and will add that header to the document.

If the header value is an array, then the add_header() function will iterate through the array and add the header values to the document.

The final option is to use the wp_set_header() function. This function takes in a single header value, and will set that header to the document.

If the header value is an array, then the wp_set_header() function will iterate through the array and set the header values to the document.