How to make wp functions work in your php file?

Question

WordPress

How to make wp functions work in your php file? It is located in my \wp-content\themes\landingpage\js\emailSendParticularly interested in functionsget_option('blogname');

Answer 1

In order to use WP functions in a third-party script, you need to download the WordPress core .
To do this, you need to insert at the beginning of the file:

# Load WordPress Core
// Assuming we're in a subdir: "~/wp-content/themes/landingpage/js/emailSend"
require_once( '../../../../../wp-load.php' );

Now you can use all the features of wordpress