How to get the featured image inside of a single-.php template?

I think this may help you 

if(has_post_thumbnail())
{ 
     the_post_thumbnail( 'full' );
}

Reference : Featured Images & Post Thumbnails

Related Posts:

  1. Display Taxonomy Image on single.php
  2. How do you remove hard coded thumbnail image dimensions?
  3. How do you get the post thumbnail size?
  4. Setting a post’s featured image from an embedded YouTube video
  5. How to get featured image’s width and use elsewhere in template?
  6. Minimum Dimensions Requirement for Featured Image?
  7. Display thumbnail only if requested size exists
  8. the_post_thumbnail hard cropping not working no matter what
  9. the_post_thumbnail with lazyload JQ plugin
  10. Display Post Thumbnail Without Being Featured Image
  11. Featured Image of Video from oembed
  12. Prevent WordPress from cropping GIF files
  13. Multiple featured image thumbnails for post types (Multiple Post Thumbnails plugin)
  14. Set post-thumbnail (with php)?
  15. get_thumbnail_id returns full size image
  16. can the_excerpt function also get images?
  17. Change Output for Images in Content
  18. Add post title as alt tag for featured image
  19. How to scale up image into thumbnail without distorting it?
  20. Using Gutenberg block components in admin interface controls
  21. How to Remove Two (Related) wp_postmeta Rows?
  22. previous / next post with thumbnail
  23. Multiple Post Thumbnails plugin and attachment error
  24. WordPress resizes image to the same size as uploaded
  25. Possible to swap in a placeholder image globally for the_post_thumbnail_url if one doesn’t exist?
  26. How to set an attachments parent post id in code?
  27. How to use wp_get_attachment_metadata for thumbnails
  28. Wrap post thumbnail with
  29. Use wp_remote_get to add image to media library
  30. Can a thumbnail of an animated gif be animated?
  31. Is it possible to get local image URL when also having photon active?
  32. Featured Image Size Conditional Tag?
  33. How can I call a thumbnail/featured image to be a background image?
  34. create new post using rest API and set featured Image from an external link
  35. Replicate featured image functionality
  36. Woocommerce – remove the default image placeholder? [closed]
  37. Remove link from post images
  38. Call Featured Image from Parent Page
  39. How to add post featured image url to inline background url()?
  40. Allow author to choose his featured image size
  41. How to get cropped thumbnail source for custom post type
  42. Using thumbnail functions inside a shortcode
  43. Featured image for first post only
  44. Featured Image Not Working when loaded from sub-domain
  45. How can I use a static (ish) URL for the featured image for a post?
  46. Generate image for newly added size
  47. get_the_post_thumbnail ignores my default thumbnail size [closed]
  48. Remove the link to a featured image if and only if it’s not a gif
  49. featured image inside post
  50. How to query posts with featured images
  51. hrecipe microformat tag to “featured image”
  52. Server B handling add_image_size() differently than Server A
  53. the_title() is not displaying over the_thumbnail
  54. Show posts image attachments
  55. Choose to Display Post Thumbnail?
  56. How do I make images appear in the beside blog post summaries?
  57. Featured Image meta box shows at the bottom?
  58. How to get featured image thumbnail to open larger version in attachment page?
  59. How To Use YouTube Url Stored In Custom Field To Get Video Image and Set it As Featured Image
  60. Display post thumbnail in foreach loop
  61. Add image size array to a portfolio thumbnail in combination with Masonry Jquery Plugin
  62. Define width of featured image thumbnails, but also make responsive?
  63. Add title to image post
  64. How to attach images that I “insert from url” into the post?
  65. If no featured image, add one of the default images into DB
  66. the_post_thumbnail(‘medium’) still gives thumbnail-size img
  67. My Gallery Photos are showing in the post’s excerpts
  68. the_post_thumbnail not resizing
  69. How to add featured images to posts from a category
  70. Thumbnail size problem Desktop vs Mobile site
  71. How do you code a featured image into an XML as a jpg link, instead of using a data-id number?
  72. Change featured image when changing viewport
  73. Adding guiding text to the ‘Featured Image’-box in the backend
  74. Thumbnails regenerate wp_generate_attachment_metadata
  75. Post thumbnail not working when previewing post
  76. Using the_post_thumbnail do not rollback to original image if specified thumbnail does not exist
  77. Get author image from corresponding article in thumbnail
  78. Missing image size
  79. How to add post thumbnail on posts on sites homepage?
  80. water mark on featured post image in wordpress
  81. Making a ‘featured image’ become the image for a full banner (top of page) image in a blog post?
  82. How to change text of Remove featured image
  83. Add space under featured image in singel post
  84. IF statement to filter featured image article
  85. Genereate widescreen featured images in different sizes
  86. set_post_thumbnail() shows Unattached on backend under Media
  87. How to get the URL of a each custom image size of a featured image
  88. Recent posts show thumbnail
  89. Add Featured Image from Existing wp-content folder
  90. Featured Images missing on migrated site
  91. Pointing Existing featured images to s3 bucket
  92. Displaying All Parent Pages as Featured Images
  93. Featured Images not appearing
  94. Editing featured image
  95. WordPress save thumbnail but don’t show it [closed]
  96. Get all images from posts with maximum number and without featured image
  97. Display featured image as post thumbnail
  98. How can I make thumbnails a display different size/position if the blog post was posted before a specific date?
  99. Scan for first image in post and display it [duplicate]
  100. Hot to change resized image link on posts