eebe549408
`wp_insert_term()` doesn't allow the creation of a term when the term `name` is the same as another term in the same hierarchy level of the same taxonomy. Previously, this duplicate check used `get_term_by( 'name' )`, which uses the database collation to determine sameness. But common collations do not distinguish between accented and non-accented versions of a character. As a result, it was impossible to create a term 'Foo' if a sibling term with an accented character existed. We address this problem by using `get_terms()` to do the duplicate check. This query returns all potentially matching terms. We then do a stricter check for equivalence in PHP, before determining whether one of the matches is indeed a duplicate. Props boonebgorges, tyxla, geza.miklo, mehulkaklotar. Fixes #33864. git-svn-id: https://develop.svn.wordpress.org/trunk@34809 602fd350-edb4-49c9-b593-d223f7449a82