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<?php mb_internal_encoding('UTF-8'); $value = 'g' . chr(0xa4) .'eld'; var_dump(mb_substitute_character('long'), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character()); var_dump(mb_substitute_character(0x3013), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character()); var_dump(mb_substitute_character('entity'), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character()); var_dump(mb_substitute_character('onzin'), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character()); var_dump(mb_substitute_character('none'), mb_convert_encoding($value, 'UTF-8'), mb_substitute_character());

preferences:
35.78 ms | 402 KiB | 5 Q