How to Pass values to Custom Field through PHP in WordPress Posts?

You can use update_post_meta:

update_post_meta( $post_id, 'custom_count', $count_value );

Related Posts:

  1. Advanced Custom Fields: how do I check to see if a value is set in an field? [closed]
  2. Where are custom field values stored in the database
  3. Advanced Custom Fields – Get custom fields from parent page
  4. Add custom field to the archive page?
  5. Matching Serialized Arrays with meta_query
  6. How to position a custom field before the editor
  7. Display post_object content using Advanced Custom Fields plugin
  8. Remove old custom field after import
  9. Unable to get Preview of Uploaded image within a Custom Meta box
  10. Change content before writing to database
  11. Order Custom post type loop by custom field (datepicker)
  12. Using Custom Function With Advanced Custom Fields
  13. Problem with adding exta field in metabox in custom post type
  14. Copying Custom Meta Values from existing post to a duplicate post
  15. Calculate the sum of certain the_sub_fields
  16. Displaying Custom Fields on Post with Genesis Child Theme
  17. Unable to show ACF’s Image Custom Field properly in Genesis Framework [closed]
  18. Login & Register & Custom details WITHOUT plugin
  19. Send Multiple Custom Field Values Through the URL
  20. ACF won’t load from a custom JSON location
  21. Show ACF fields only on certain page in the backend
  22. Update posts after populating ACF field value [closed]
  23. How can I pass a variable set by ACF to header.php?
  24. WP Custom Fields Metabox Disappears – ACF plugin issue [closed]
  25. Transfer self made functions.php custom fields to Advanced Custom Fields [closed]
  26. ACF: How to get the full field name (meta_key) by a field key?
  27. Dynamically fill a post custom field with post publish date
  28. How can I store a file in the database in the same way WordPress and ACF do?
  29. Will loading too many ACF Fields cause slow down?
  30. WP_User_Query pulling ACF to loop
  31. Calling the “wp-link-wrap” pop-up modal
  32. Print custom field in Query Loop block
  33. How to add Advenced Custom Fields In Single Post
  34. How to schedule a custom field value update?
  35. Order RSS content by an advanced custom field value
  36. Get an advanced custom field after post publish
  37. How to create a dropdown select of all items in an ACF field group
  38. Advanced Custom Fields dynamic update_field
  39. WooCommerce – Adding Custom Fields To Invoice
  40. Sort custom post type by multiple custom fields
  41. Vimeo thumbnails
  42. Advanced Custom Fields WYSIWYG More tag
  43. Walker class for sub-menu with ACF fields
  44. Custom fields issue [closed]
  45. Querying posts by latitude and longitude to build a Google Maps with several markers
  46. ACF: How to get users with a ACF flexible content subfield with a specific value AND layout?
  47. How to copy data from a custom field to the post_content?
  48. WordPress creates new lines in postmeta table on post update
  49. ul list with only as many li’s as filled custom fields
  50. Retrive Image URL of Custom Fields in Theme
  51. Display custom field from the front page on another page
  52. Let Users Filter Posts by Custom Fields
  53. Filter posts by custom field (Advanced Custom Fields)
  54. Advanced Custom fields not available yet during publish_page action
  55. The conditional logic only works to show or hide?
  56. Custom field Search with Relavanssi
  57. Need to search a custom field (ingredients, one long string per post), but want it to allow phrases/non-exact matches
  58. How To Save Data From Remote APIs To ACF?
  59. comments_where Hook
  60. Rewrite comment form post ID on submit
  61. ACF field group not showing in page
  62. What am I missing in this Code Block?
  63. How to show ACF fields in Gridbuilder custom block
  64. get_field values for each post on home page using wp_add_inline_style
  65. How to set up page fields with gutenberg instead of ACF
  66. Shortcode for Custom Field of Media Attachment (to use with Featured Images)
  67. ACF multi taxonomy on filterable gallery
  68. How to use ACF with javascript to update custom field values?
  69. Weird custom fields data lost
  70. adding autosave feature to custom fields
  71. Retrive acf fields in publish_post action for wp_mail
  72. Getting user’s data, by custom field lookup (meta)
  73. How to delete attachments associated with custom field type when post property changes? [closed]
  74. ACF – Compare user and post data
  75. Counting number of images from loop
  76. Page template is missing fields or is invalid when I updating the template
  77. How to add content with a filter when there’s no content in the editor
  78. Advanced Custom Fields from Category – IF statement
  79. Using ACF Custom Field value in a URL with do_shortcode() [closed]
  80. display Flexible Fields from options
  81. WordPress taxonomy child image
  82. Filter and display a specific custom field value [closed]
  83. Display different category template if custom field is checked
  84. How to filter post using custom feild value in shortest and longest duration?
  85. Query Posts Via WordPress URL
  86. How to Order Posts by Custom Fields?
  87. Fetch data from a WP page with same name as current username
  88. Get custom field from other post in carousel
  89. I want to add a custom field in the rss title of each post, but don’t want it to be shown on the site
  90. Update field name without losing the value
  91. Advenced custom fields auto fill problem
  92. Adding custom field to an array
  93. Add image custom attribute [closed]
  94. How to get all specific fields from one ACF Group?
  95. Truncating characters in Advanced Custom Fields works some places but not others?
  96. save all acf options in one meta_value [closed]
  97. Conditional display based on ACF checkbox
  98. acf field repeater link don’t work
  99. How to add an ACF only for parent term?
  100. ACF in radio button cf7