wp-admin/includes/options.php:136Render the site charset setting.
function options_reading_blog_charset() { echo '<input name="blog_charset" type="text" id="blog_charset" value="' . esc_attr( get_option( 'blog_charset' ) ) . '" class="regular-text" />'; echo '<p class="description">' . __( 'The <a href="https://wordpress.org/documentation/article/wordpress-glossary/#character-set">character encoding</a> of your site (UTF-8 is recommended)' ) . '</p>';}Introduced in 3.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/options.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.