Merge Multiple Custom Fields into one New Custom Field for Searching

Related Posts:

1. Using meta query (‘meta_query’) with a search query (‘s’)
2. Including custom fields in search?
3. Add custom fields to search
4. Custom search: by post data and post metadata?
5. Need small coding with Custom Fields Search
6. Search ONLY by meta key / meta values
7. Filter results with custom field values and dropdown
8. Add custom field (value) to search result (without plugin)
9. Is there a way to do multiple ordering on a multiple meta_query?
10. searching in custom meta field
11. WordPress Search Custom Meta Field Only
12. Exclude custom post type from search by custom field value?
13. Extend ‘The Events Calendar’ search to include custom fields [closed]
14. Include woocommerce custom field value in front-end search result
15. Including Database Generated Pages in Site Search [closed]
16. Adding Custom Fields to Search
17. sort search results by custom fields using dropdown
18. Using a checklist to search against metadata
19. How do I use wp_query for WordPress search?
20. Custom Fields Not in Search Results
21. How make a custom search on backend in WordPress without plugin?
22. filtering custom post types via meta data drop down
23. Advanced search by two criteria – sort by location and date (ascending or descending)
24. How do I have WP_Query match posts based on search parameter OR meta fields? (rather than search parameters AND meta fields)?
25. Advanced search for meta fields
26. How to populate custom field dropdown box based on prior selection?
27. Search in Archive Pages by subcategory, tag, custom field and year
28. Custom WP_Query for WordPress Search Results with meta_query
29. filter custom field values $min $max
30. Restrict WordPress Search to Custom Field
31. How can you include custom post meta in search without calling each key?
32. Include one custom field in search results
33. Custom search SQL Query to add custom field in result
34. Search Results Page – Displaying Custom Meta Fields
35. Custom field Search with Relavanssi
36. How to exclude custom fields from search queries?
37. How to show content of custom fields in search results?
38. Searching with Multiple (Parallel) Criteria on Custom Fields?
39. Need to search a custom field (ingredients, one long string per post), but want it to allow phrases/non-exact matches
40. Type character in name and make it invisble
41. Search & column order by meta value in admin
42. search based on custom field
43. Very large list of options for BuddyPress profile fields
44. searching by keywords in post’s metas or pagination links problem
45. Search fails when using the radio buttons
46. Admin – Search Events by a custom field
47. Search one custom field?
48. Create custom query for search?
49. Query postmeta values, and return multiple post_titles for common meta value
50. Query Custom Fields in Searchform
51. Help sorting by Meta Key value
52. Custom search with meta fields
53. How to display search query as formatted text?
54. Search for meta_query does not return any result if combined with title
55. Search by Custom Field content OR post id via the WordPress Dashboard
56. Advanced Custom Fields: how do I check to see if a value is set in an field? [closed]
57. WP_Query – Order results by meta value
58. Add filter menu to admin list of posts (of custom type) to filter posts by custom field values
59. getting all values for a custom field key (cross-post)
60. Extending the search context in the admin list post screen
61. How to add a custom field in the advanced menu properties?
62. Custom query with orderby meta_value of custom field
63. How to filter post listing (in WP dashboard posts listing) using a custom field (search functionality)?
64. Can I exclude a post by meta key using pre_get_posts function?
65. Advanced search form with filters for custom taxonomies and custom fields
66. Add validation and error handling when saving custom fields?
67. Query to sort a list by meta key first (if it exists), and show remaining posts without meta key ordered by title
68. Show Custom Fields in Quick Edit
69. Where are custom field values stored in the database
70. Validating Custom Meta Box Values & Required Fields
71. Max length of meta_value
72. Add custom fields to wp native gallery settings
73. How to fix missing custom fields after upgrading to WordPress 4.8.1?
74. How to enable custom fields for pages (if not a bad practice)?
75. How can I add extra attribute in the ‘Page Attribute’ section in wp-admin for pages?
76. Is there a way to set default custom fields when creating a post?
77. Custom post meta field effect on the performance on the post
78. How to get custom post meta using REST API
79. Custom field/meta populated by dropdown of existing posts?
80. Difference between meta keys with _ and without _ [duplicate]
81. How do I improve this admin query snippet to avoid generating duplicate results on non-meta searches?
82. Is there any action filter/hook for validating a custom field before publishing the post?
83. Remove Dimension from wp_get_attachment_image
84. Orderby meta_value only returns posts that have existing meta_key
85. Underscores in custom fields
86. What is the index [0] for on post meta fields?
87. What is “meta_input” parameter in wp_insert_post() used for?
88. Query Posts or Get Posts by custom fields, possible?
89. How to enable revisions for post meta data?
90. Sortable Custom Columns in User Panel (users.php)?
91. Any way to add custom options to Gallery Settings?
92. The “_encloseme” Meta-Key Conundrum
93. ORDER BY custom field value
94. Individual Widgets per Page
95. Add subtitle to Woocommerce product title
96. How can I change the admin search posts fields?
97. Best way to programmatically remove a category/term from a post
98. Importing data for advanced custom fields plugin?
99. Gutenberg add a custom metabox to default blocks
100. SQL Query to copy value of a meta_key into another meta_key