If it is all on same server it is rather easy to load WP engine and parts you need, see Integrating WordPress with Your Website.
Otherwise there is probably better to get specific data (rather than whole page) from WordPress remotely, but there are a lot of approaches to that. Also I am not aware of any off-the-shelf code that allows to do that for sidebars. For post content there is XML-RPC support and plugins for other formats (I think I read about JSON one).
Related Posts:
- When adding a custom REST endpoint, where do you put the endpoint function, and where do you put the function registration call?
- Getting $comments outside the comment template
- simple wp_insert_post example
- Retrieving and Storing Images Linked from Other Domains on Local Server?
- How wp_ajax_nopriv since WordPress 3.1
- WP_Query with the “offset” argument
- Stopping People Viewing Draft Posts
- How to use get_option() without any filter?
- Custom Login and Registration form in Ajax
- Calling a php file from a javascript file in wordpress
- Filter Custom Post Type by Category with Ajax
- Load more posts with multiple queries
- Viewing checkout page removes fees from mini cart
- Load MediaPlayerElement after Infinity Scroll loads more posts
- How can I display a PHP foreach loop’s answers by AJAX
- Dynamically switch template on click
- I want to print a message in post ” After one month from publish date”
- Specific colours for wordpress author ids
- Troubles about insering a POST with a SQL query, post_status
- mailchimp integration on a custom footer
- How to create custom search form function including post “tags”
- POST 429 Error when trying to place more than 20 images into post at once
- How to submit form data in the same page in WordPress without reloading the page?
- Unable to show messages using ‘admin_notices’
- Restrict custom post type to only site administrator role
- How to *remove* a parent theme page template from a child theme?
- How to disable page delete
- How to force one column layout on custom post type edit page?
- WordPress hook before inserting post into database
- How to update the delete user confirmation form?
- In the new Theme Customizer API, how to send a value from the front back to the admin panel?
- How do I add Post Like and Bookmark Functionality to my WordPress Site?
- How to exclude certain widget from showing up on home/front page? [duplicate]
- Display posts in random post types
- Add custom field to category of custom post type
- sanitize attachment filename
- Modifying loop on a custom page, strange behaviour
- WordPress theme ajax have_posts()
- Custom Theme Want To Remove One Category From All Displays
- How do I use Ajax to show the new posts realtime, on the frontpage
- Add filename to attachment page url
- wp_query ‘s’ parameter does not work with custom post type
- How do I add a new template to my site
- Create simple Cookie Box for WordPress
- How to display data in archive page?
- Does wordpress prevent non wordpress pages from being allowed on the same domain?
- How to add custom page attributes in WordPress?
- How can I use a Tiny MCE editor in my custom Gutenberg block?
- CPT archive redirects to single post
- Duplicate Custom Post Type and Taxonomy Slug
- How to allow visitors to filter posts by multiple taxonomies
- How to customize and keep things up-to-date?
- Problem with custom user meta field
- What are “best practices” for wp-config.php
- a little direction on custom post type
- Why use admin-ajax.php when loading pages through AJAX?
- What happens to the mu-plugins folder when you upgrade to WordPress 3?
- How to show wp.me shortlink underneath each post?
- Change admin avatar only (without Gravatar or plugin)?
- How do I change the element using a custom function?
- Is it necessary to prefix theme_mod, section id and panel id in the customizer?
- Query for specific custom field
- Create a custom admin panel
- Translate custom template with WPML
- What are some good resources for teaching end-users how to use WordPress?
- How can I resolve a .htaccess internal server error setting up a WordPress multisite?
- Is it possible to add custom badges to product attributes conditionally, based on custom field?
- Product page not found if product data is set Appointment Service
- I want to embed mystream video in my wordpress site
- Current menu item highlights wrong
- Measure time in ONLY HOUR format
- How can error pages be customized
- delete post hook not being fired when deling in wordpress dashboard admin
- Replace an URL with an new URL which has a “?” in it
- WordPress Delete Users from backend doesn’t work
- Contact form 7 ajax response true/false based on some condtion
- Child Theme – Changing Header
- remove or hide Link Relationship (XFN) form Menus tab
- Custom post styling per category?
- How to add custom classes to a WordPress theme HTML tag?
- Displaying Child Page’s Information
- Changing ‘Add to cart’ button text and relink for some specific products [closed]
- adding a custom time class to in theme twenty sixteen
- ‘str_replace’ and ‘strtr’ not working inside plugin
- SAving PHP in custom wordpress option field
- Does WordPress support template resources/custom fields
- Meta boxes not saving
- Change default “Apply Changes To” radio option when editing images
- Edit a custom admin page
- Allow users to create their own page/s
- If I delete my wordpress site then does that delete all my sites?
- Remove Twenty Twelve themes responsiveness in Internet Explorer
- Looking for a way to take readers to random post when clicking a link
- Cannot upload to S3 using CDN Sync Tool
- Custom Import with taxonomies
- Very Simple Geo targeting
- Consolidate ‘add-to-cart’ buttons into one ‘add-all-to-cart’ button
- Update to WordPress 4.9.2, but have heavily customized theme
- Storing form data into wordpress database [closed]
- Post interior margin in twenty eleven theme