How to inject attributes into get_the_post_thumbnail?

You need to use get_the_post_thumbnail_url (the one you’re using echo‘s the URL).

get_the_post_thumbnail( $the_post_id, 'medium', [
    'data-zoom-image' => get_the_post_thumbnail_url( $the_post_id, 'full' ),
]);

Related Posts:

  1. How do I set a featured image (thumbnail) by image URL when using wp_insert_post()?
  2. How do I get image url only on the_post_thumbnail
  3. How to get image title/alt attribute?
  4. How to Fix HTTP Error When Uploading Images?
  5. Add class name to post thumbnail
  6. How to disable WordPress from creating thumbnails?
  7. How to retrieve image from URL and set as featured image/post thumbnail
  8. How to set featured image to custom post from outside programmatically
  9. How do you remove hard coded thumbnail image dimensions?
  10. How do you get the post thumbnail size?
  11. Setting a post’s featured image from an embedded YouTube video
  12. How to get featured image’s width and use elsewhere in template?
  13. set_post_thumbnail_size vs add_image_size
  14. Minimum Dimensions Requirement for Featured Image?
  15. Generate Thumbnails only for Featured Images
  16. How to get all featured image sizes and their URLs?
  17. How to Dynamically Resize WordPress Image On-The-Fly (custom field/theme option)
  18. How to add post featured image to RSS item tag?
  19. How do I regenerate thumbnails?
  20. Display thumbnail only if requested size exists
  21. Delete original image – keep thumbnail?
  22. the_post_thumbnail responsive srcset not populating with custom image size
  23. Set custom name for generated thumbnails
  24. Post thumbnail alt title
  25. Get Featured Image via direct sql query
  26. Get featured image on Blog Index
  27. the_post_thumbnail hard cropping not working no matter what
  28. Can I refresh the thumbnails programmatically?
  29. How to add multiple image sizes of the same size with add_image_size
  30. New image size version only for the Featured Image file
  31. wp_get_attachment_image_src always returns full-sized image
  32. Get featured image URL by page id
  33. change set_post_thumbnail_size according to post type admin page
  34. Add Title Attribute to WordPress Image the_post_thumbnail
  35. Can’t extract and set SVG dimensions
  36. Set Featured Image Front Frontend Form
  37. Getting Thumbnail Path rather than Image Tag
  38. Display Category Thumbnail and links in Woo commerce
  39. the_post_thumbnail with lazyload JQ plugin
  40. Replacing Gutenberg Featured Image control?
  41. Display Post Thumbnail Without Being Featured Image
  42. Featured Image of Video from oembed
  43. oEmbed, thumbnails and wordpress
  44. wp_get_attachment_image_src() and custom sizes
  45. Prevent WordPress from cropping GIF files
  46. media_sideload_image generates blank?
  47. Post thumbnail outside the loop
  48. What’s the difference between post thumbnails and featured images (if any)?
  49. Getting custom-sized featured image’s URL?
  50. What is your take: TimThumb vs. WordPress Thumbnails? The great debate [closed]
  51. How to crop thumbnail height to auto with set width
  52. Retrieve 1st image in post and set it as featured image, when post is saved/updated
  53. Use thumbnail image using url of that image
  54. Retrieve featured image as object
  55. How do I add the featured image to the_content after the first paragraph?
  56. Showing a placeholder/default img, if no featured image is set
  57. Re-order media links?
  58. Multiple featured image thumbnails for post types (Multiple Post Thumbnails plugin)
  59. the_post_thumbnail scaling not hard cropping
  60. Skip posts without a thumbnail in loop
  61. wp_get_attachment_url( get_post_thumbnail_id($post->ID) ); Getting thumb from wrong loop
  62. Set featured image for multiple posts
  63. Image uploader with “Set Featured Image” link on front end
  64. adding an id to the_post_thumbnail
  65. Featured image size in ADMIN panel?
  66. Featured image with the same height thumbs returns wrong thumb
  67. How can I display my featured image correctly inside my single posts?
  68. How to change the naming of the resized image files
  69. Featured image upload finished hook
  70. How to get featured post title & image using JSON API?
  71. Generate thumbnail for images with the same size as thumbnails
  72. Set post thumbnail as background
  73. Display thumbnail only on the very first post in the loop?
  74. How to show featured image CAPTION only if it exist
  75. Set post-thumbnail (with php)?
  76. get_thumbnail_id returns full size image
  77. Implementing Zurb’s Interchange Into WordPress
  78. can the_excerpt function also get images?
  79. How to get_posts having post thumbnail?
  80. Add Image Dimensions to Media Library Tab on Media Upoader
  81. Change Output for Images in Content
  82. Featured Image Inherited from Parent Page
  83. Change wording of default thumbnail metabox
  84. Specific featured image for each category
  85. how to pull images with no add_theme_support(‘post_thumbnails’)
  86. Can WordPress crop only the post thumbnails?
  87. Allow user to manually set crop area of default/custom image sizes on upload [closed]
  88. Add post title as alt tag for featured image
  89. get_pages – Display child then grandchild pages
  90. How to replace the_post_thumbnail template tag and show the first inside the post image instead
  91. Display child pages on a parent and child page using Featured Thumbnails
  92. Query the post which have a thumbnail
  93. Featured image for news page
  94. How to get the image sizes, in a function, as per the sizes mentioned in the media settings?
  95. How to scale up image into thumbnail without distorting it?
  96. Using Gutenberg block components in admin interface controls
  97. How to Remove Two (Related) wp_postmeta Rows?
  98. Resizing Images to lower Disk Space Using Plugins
  99. How to change _wp_attachment_metadata specific value in SQL?
  100. Fallback default image when there is no featured image
Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)