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<?php $input = "Wij #^@ & zij !> !-?!"; echo rtrim(preg_replace('/([^a-z0-9]+)/', '-', strtolower(preg_replace("/&([a-z])[a-z]+;/i", "$1", htmlentities($input)))), '-');

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38.69 ms | 402 KiB | 5 Q