Max Upload Size

// Max Upload Size / Kiri Vadivelu / 2026

function max_upload_size( $file ) {

    $max = 9 * 1024 * 1024; // 9 MB

    if ( $file['size'] > $max ) {

        $file['error'] = 'File exceeds the 9 MB maximum upload size.';

    }

    return $file;

}

add_filter( 'wp_handle_upload_prefilter', 'max_upload_size' );