wp-includes/rest-api.php:515Retrieves the URL to a REST endpoint on a site.
$blog_idint|nulloptionalnull$pathstringoptional'/'$schemestringoptional'rest'stringOne hook fires while get_rest_url() runs, in this order:
function get_rest_url( $blog_id = null, $path = '/', $scheme = 'rest' ) { if ( empty( $path ) ) { $path = '/'; } $path = '/' . ltrim( $path, '/' ); if ( is_multisite() && get_blog_option( $blog_id, 'permalink_structure' ) || get_option( 'permalink_structure' ) ) { global $wp_rewrite; if ( $wp_rewrite->using_index_permalinks() ) { $url = get_home_url( $blog_id, $wp_rewrite->index . '/' . rest_get_url_prefix(), $scheme ); } else { $url = get_home_url( $blog_id, rest_get_url_prefix(), $scheme ); } $url .= $path; } else { $url = trailingslashit( get_home_url( $blog_id, '', $scheme ) ); /* * nginx only allows HTTP/1.0 methods when redirecting from / to /index.php. * To work around this, we manually add index.php to the URL, avoiding the redirect. */ if ( ! str_ends_with( $url, 'index.php' ) ) { $url .= 'index.php'; } $url = add_query_arg( 'rest_route', $path, $url ); } if ( is_ssl() && isset( $_SERVER['SERVER_NAME'] ) ) { // If the current host is the same as the REST URL host, force the REST URL scheme to HTTPS. if ( parse_url( get_home_url( $blog_id ), PHP_URL_HOST ) === $_SERVER['SERVER_NAME'] ) { $url = set_url_scheme( $url, 'https' ); } } if ( is_admin() && force_ssl_admin() ) { /* * In this situation the home URL may be http:, and `is_ssl()` may be false, * but the admin is served over https: (one way or another), so REST API usage * will be blocked by browsers unless it is also served over HTTPS. */ $url = set_url_scheme( $url, 'https' ); } /** * Filters the REST URL. * * Use this filter to adjust the url returned by the get_rest_url() function. * * @since 4.4.0 * * @param string $url REST URL. * @param string $path REST route. * @param int|null $blog_id Blog ID. * @param string $scheme Sanitization scheme. */ return apply_filters( 'rest_url', $url, $path, $blog_id, $scheme );}Introduced in 4.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rest-api.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.