php
function round_images() {
    $images = get_posts( array( 'post_type' => 'attachment', 'post_status' => 'inherit' ) );
    foreach ( $images as $image ) {
        $image_id = $image->ID;
        $image_url = wp_get_attachment_image_src( $image_id, 'full' );
        $image_url = str_replace( '.jpg', '-rounded.jpg', $image_url );
        wp_update_attachment_metadata( $image_id, array( 'sizes' => array( 'full' => array( 'width' => 1200, 'height' => 1200, 'crop' => true ) ) ) );
        $image_url = wp_get_attachment_image_src( $image_id, 'full' );
        update_option( 'siteurl', str_replace( 'http://', 'https://', $image_url ) );
    }
}
add_action( 'init', 'round_images' );