<?php $str = 'ä€'; var_dump(strlen($str)); var_dump(mb_detect_encoding($str, 'auto', true)); $iso = mb_convert_encoding($str, 'iso-8859-1', 'utf-8'); var_dump(strlen($str)); var_dump(mb_detect_encoding($iso, 'utf-8, iso-8859-1', true));
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