<?php $needle = Normalizer::normalize('äöüß', Normalizer::FORM_D); $haystack = Normalizer::normalize('Täöüßtstring', Normalizer::FORM_C); var_Dump(strpos($haystack, $needle)); var_Dump(mb_Strpos($haystack, $needle)); var_dump(grapheme_Strpos($haystack, $needle));
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