I want to show my post for limited time, how is it possible?

You should use cron job. Yes WordPress has a function wp_schedule_event (). This function will perform certain operations based on the time difference you add it.

Say for example, if you schedule it daily this will works everyday and perform the operarions on daily basis.
you can hook a function with wp_schedule_event. Just get the published posts list and from the posts check the date of publish and current time. If it marches today leave it. Otherwise you can edit the post and change the status as draft or you can even delete it.
Here I didn’t give you code samples. If you require there are many question available about cron job and post status change. Just Go through it.

Related Posts:

  1. Increase 10 post limit per page
  2. Difference between an archive and a page listing posts
  3. has_archive=false on the default post type
  4. Different number of posts in each category
  5. Clear cache when a post is submitted [closed]
  6. How to limit user to publish post per day and per role?
  7. Create an “All Posts” or “Archives” Page with WordPress 3.0?
  8. Post Format Archive template name for theme folder?
  9. Restrict users from editing post based on the age of the post
  10. Restrict access to post if it is currently being edited
  11. widget should display post archive by year and on click also by month
  12. Must permalinks always point to single post pages?
  13. At my posts archive page, outside the loop, get_the_id() returns the top most post’s ID
  14. Display most recent post in category instead of archive?
  15. Single.php Active Category Class
  16. Link for the page archive for posts, like using custom post types with get_post_type_archive_link
  17. get_post_type_archive_link(‘post’) returns current category archive
  18. How to get the latest posting time of archived pages in WordPress?
  19. change default post archive page link
  20. WP_Query posts_per_page ignored
  21. Display all months with posts and inside each month show the 5 latest posts
  22. Display posts from #6 to #20 on archive page
  23. Category List (Archive) Page Template By Category
  24. Limiting the number of posts in WP_Query leads to unexpected result
  25. Getting category posts from a certain year
  26. Yearly archive page for future year
  27. Which URL to enter into browser to show all posts in archive.php?
  28. Limit posts per author role (excluding admin) in home page
  29. How to display data in archive page?
  30. Guest Author – How to display posts on /author/ archive page
  31. Restrict users post for himself
  32. How to limit posts by category
  33. Archiving by academic year instead of calendar year
  34. List category posts alphabetically on archive.php
  35. How can i limit the number of posts created per category?
  36. How to display excerpt post on hamepage and archive pages?
  37. Automatically create a new page daily with last three posts
  38. Archiving posts in wordpress
  39. query post limits
  40. Custom Post Type archive
  41. Does WP automatically tag posts into the archive?
  42. singular posts using archive styling
  43. Custom Post Limit for homepage only without plugin?
  44. How can I set a maximum allowed post size and number of posts submitted?
  45. Exclude a category of posts in author template
  46. How to edit the ‘
  47. Post-Archive like a page in a specific subdirectory
  48. Display in category ( taxonomy) a number of post that I want
  49. Setting limit to posts or page creation
  50. Find out in which kind of archive am I
  51. adding my posts (author posts) in menu
  52. How to view all posts (on site, not admin) that are uncategorized?
  53. Archieve page, Advertisement Every 3 Posts
  54. Highlighting Current Category in the Archive and Feeds page
  55. How to limit post (Exception pages) for current user in each role in front end?
  56. Permalink Short code showing unnecessary link text inside the loop
  57. How to hide protected posts from archive?
  58. blog post not accesible on click [closed]
  59. Limit front-end submitted posts by role
  60. Redirect to custom post if custom archive page has just one result?
  61. Posts are not displaying on their category and tag page
  62. If user has 1 post then dont let him create new one [closed]
  63. show image gallery in archives or category page
  64. Prevent Archive URLs
  65. view a list of 3 future post, from the nearest to the most far
  66. Get posts from category from custom query
  67. How do I apply a wordpress function to something with no ID inside an archive page?
  68. Page 2 has no posts?
  69. Disable archiving of old posts?
  70. is_archive() not working on selected “Posts page”
  71. numberposts not working
  72. How to display term in archive page?
  73. My posts section for logged in user
  74. How to organise post by category and date
  75. How Can I Limit Users to Post Creation For My Frontend Theme?
  76. Daily posts like an archive
  77. How to set a link to custom archieve page
  78. How to limit the number of results for all query_posts on mysite
  79. Set the limit to allow author when make post!
  80. How to get alphabetic listing x other posts, based on first letter post?
  81. How do I display the next 3 posts in the sidebar?
  82. limit posts per page
  83. Display all posts from selected month
  84. How to get pagination working with “Pending” Posts
  85. Show all posts in category
  86. custom sort posts in archive/taxanomy page
  87. wp trim function not working
  88. how to show all post with its contents
  89. Add author section on Author archive posts
  90. Display post count on archive page in reverse order
  91. Filter/Sort Post Form On Taxonomy page
  92. How to programmatically create posts in wordpress?
  93. is there a better way of combining this?
  94. wp-cli post create & media import issues
  95. How show categories in admin and get that selected to show posts in index
  96. Do not show children of a category
  97. Where exactly should I hook in order to change the post’s ID before insertion in the database?
  98. Make categories appear random
  99. How to find the edit link of the WordPress Post from the URL
  100. Post pages are redirecting to the 404 page in wordpress