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<?php function stripDiacritics(string $string): string { return preg_replace('/[\x{0300}-\x{036f}]/u', '', Normalizer::normalize($string , Normalizer::FORM_D)); } var_dump(stripDiacritics('äüößà')); var_dump(stripDiacritics('c̳̻͚̻̩̻͉̯̄̏͑̋͆̎͐ͬ͑͌́͢h̵͔͈͍͇̪̯͇̞͖͇̜͉̪̪̤̙ͧͣ̓̐̓ͤ͋͒ͥ͑̆͒̓͋̑́͞ǎ̡̮̤̤̬͚̝͙̞͎̇ͧ͆͊ͅo̴̲̺͓̖͖͉̜̟̗̮̳͉̻͉̫̯̫̍̋̿̒͌̃̂͊̏̈̏̿ͧ́ͬ̌ͥ̇̓̀͢͜s̵̵̘̹̜̝̘̺̙̻̠̱͚̤͓͚̠͙̝͕͆̿̽ͥ̃͠͡'));

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