apply_filters( ‘sanitize_key’, string $sanitized_key, string $key )

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   Steven Lin 5 years ago

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   Example Migrated from Codex:

   Filtering the output

   Remove dashes from the string key after sanitize_key() function has done its work (dash is allowed by sanitize_key() function).

   add_filter( 'sanitize_key', 'remove_dashes_from_keys' );
   
   function remove_dashes_from_keys( $key ) {
       return preg_replace( '/-/s', '', $key );
   }

   Filtering the raw key

   You can interact with the raw key as second parameter of that filter. The raw key is the exact value passed to the sanitize_key() function. You could use it to make your own sanitization of the original key.

   Note: Direct filtering of the $raw_key is not recommended since if not filtered carefully or if sanitize_key() function ever gets updated, your filter may be returning a key with characters that is prohibited by sanitize_key() function.

   add_filter( 'sanitize_key', 'do_something_with_rawkeys', 10, 2 );
   
   function do_something_with_rawkeys( $key, $rawkey ) {
       // do domething with $rawkey
       return $rawkey;
   }