wp-includes/fonts/class-wp-font-face.php:349Compiles the src into valid CSS.
$valuearraystring private function compile_src( array $value ) { $src = ''; foreach ( $value as $item ) { $src .= ( 'data' === $item['format'] ) ? ", url({$item['url']})" : ", url('{$item['url']}') format('{$item['format']}')"; } $src = ltrim( $src, ', ' ); return $src; }Introduced in 6.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/fonts/class-wp-font-face.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.