search_simplify($text, $langcode = NULL)
Simplifies and preprocesses text for searching.
Processing steps:
Entities are decoded. Text is lower-cased and diacritics (accents) are removed.
hook_search_preprocess() is invoked. CJK (Chinese, Japanese, Korean) characters are processed, depending on the search settings. Punctuation is processed (removed or replaced with spaces, depending on where it is; see code for details). Words are truncated to 50 characters maximum.
Parameters
string $text: