The code you found works not by changing the query variable but by converting another variable into the s variable that WordPress expects.
If you look at the WP_Query object, that s parameter is pretty deeply embedded into Core functionality.
The simple solution, and perhaps the only one, is to choose some other parameter for your purpose rather than attempt to hijack one that is hard-coded into fundamental Core WordPress code.
Related Posts:
- Solr vs. ElasticSearch
- Search is always exact [closed]
- Empty search returns home page, how to return not found search page?
- Limit search to latin characters
- How to look at code in WordPress repositories without downloading?
- Insert DIV container below 1st search result
- Search in WordPress – Difference of searchpage.php, searchform.php and search.php?
- How to make WordPress search prioritise page titles?
- How to add the author search in the default wordpress search?
- How to search for users based on added user metadata
- Search by Post ID and display content of the post in search result
- Let user change posts per page
- Exclude top-level pages from search results
- Search in non-English language returns only one result
- Turning Broken URLs Into Search Terms?
- How can I implement faceted search with WordPress 3.x?
- Search uses index.php instead of search.php on renaming search field from “s”
- Search results URL without query string variables
- How to control WordPress Search Behavior?
- Changing the default WordPress search action
- Set default text for the_search_query();
- Changing the search results destination URL
- What are the different options for excluding certain post types from search results?
- Search in post title and custom fields
- How to change users smart quotes to dumb quotes in search bar?
- Making a list of post tags in string
- Strange Search Queries in Apache Status
- Trim the search result around the search word
- WP_User_Query search with multiple search queries
- update default search function and get postmeta entries
- Display just child pages of a certain page in search results
- Search function works improperly
- Is there a wordpress plugin enabling an autocomplete search box, then jump to page?
- Date_query problems
- how to create search and filter form generating “plus” symbols in url in between category names?
- Need to return a list based on Slug
- Creating a Searchable PDF Archive of Publications
- Display post titles that match string in post content
- Using parent slug variable to display proper submenu not working properly
- Get Adjacent post by search query
- How to exclude pages from WP search based on page title
- why pre_get_posts works fine in post type archive, but not in search result list?
- How to get started?
- Search.php display results differently based on post type
- Improved WordPress search functionality and search form plugin
- how to show Author information in search results
- Use wordpress search to display results within a post
- How to query two meta fields and display results between them
- Sitelinks Search box schema confusion
- how to search everything
- changing search result from only excerpt to full content
- Cannot pass ‘S’ parameter more than two letters
- Localization of WP theme
- How to have multiple instances of the same taxonomy in a search form
- WP + Google analytics = /search?
- Search result count not matching actual result
- How to search for post content and attached file names
- Can’t place two custom post types into the WordPress search query?
- Searching for one letter returns extra empty post
- How to create a search form with multiple search fields
- REST API: Search products only in the names
- Bots using internal wordpress search
- Altering search results to handle a post meta field not working in current WordPress
- WordPress Search by tags
- pulling in external JSON search results into WordPress
- How to create a custom filter in WordPress?
- WordPress search post using unicode
- search results in custom template search.php
- Create search box on Archive Custom post type
- How to pass variable to get_search_form()?
- Why the search results are wrong in search posts form?
- Search isn’t displaying all results
- How to use regular page template for search results?
- Search only blog posts on blog page
- Auto search field without buttons, shows first result from search page
- Can I set up a search box that uses fields?
- How to Search Users on the Base of Latitude and Longitude in Users meta_key and meta_value
- Search Results Customization
- Returning the entire line of a custom search result filter
- search does not yield access restricted results
- Customizing Home Page with Pagelines Platform
- Search Limited to Categories Not Working
- Google Search and Own Website Search?
- How we filter the search base on post-meta tags
- Make search result returned only from tags! [duplicate]
- Form Data Causes “Page Not Found”
- WordPress search form and input type=”image”
- Search options/filters
- How to search pdf attachment?
- Website Search Results Not Showing Images
- How to search for articles containing two words?
- Wp eCommerce meta information search [closed]
- How do I create a search form that searches only within a custom post type?
- Two Querys in one Search – Category-Tag nightmare – HOW?
- How to make wordpress Dynamic Search-icon from Predesigned Static Html Search-icon?
- Code in the excerpt of the search page
- WordPress REST API response – not returning results from custom taxonomy, only from title
- Members location sortable based on UK Postcode
- I had removed my phone number from my website footer, but months later it still appears once I look it up on google, how to remove it?
- search posts by POST ID