Hướng dẫn php remove accents - php xóa dấu

$unwanted_array = array(    '&' => 'and', '&' => 'and', '@' => 'at', '©' => 'c', '®' => 'r', 
'̊'=>'','̧'=>'','̨'=>'','̄'=>'','̱'=>'',
'Á'=>'a','á'=>'a','À'=>'a','à'=>'a','Ă'=>'a','ă'=>'a','ắ'=>'a','Ắ'=>'A','Ằ'=>'A',
'ằ'=>'a','ẵ'=>'a','Ẵ'=>'A','ẳ'=>'a','Ẳ'=>'A','Â'=>'a','â'=>'a','ấ'=>'a','Ấ'=>'A',
'ầ'=>'a','Ầ'=>'a','ẩ'=>'a','Ẩ'=>'A','Ǎ'=>'a','ǎ'=>'a','Å'=>'a','å'=>'a','Ǻ'=>'a',
'ǻ'=>'a','Ä'=>'a','ä'=>'a','ã'=>'a','Ã'=>'A','Ą'=>'a','ą'=>'a','Ā'=>'a','ā'=>'a',
'ả'=>'a','Ả'=>'a','Ạ'=>'A','ạ'=>'a','ặ'=>'a','Ặ'=>'A','ậ'=>'a','Ậ'=>'A','Æ'=>'ae',
'æ'=>'ae','Ǽ'=>'ae','ǽ'=>'ae','ẫ'=>'a','Ẫ'=>'A',
'Ć'=>'c','ć'=>'c','Ĉ'=>'c','ĉ'=>'c','Č'=>'c','č'=>'c','Ċ'=>'c','ċ'=>'c','Ç'=>'c','ç'=>'c',
'Ď'=>'d','ď'=>'d','Ḑ'=>'D','ḑ'=>'d','Đ'=>'d','đ'=>'d','Ḍ'=>'D','ḍ'=>'d','Ḏ'=>'D','ḏ'=>'d','ð'=>'d','Ð'=>'D',
'É'=>'e','é'=>'e','È'=>'e','è'=>'e','Ĕ'=>'e','ĕ'=>'e','ê'=>'e','ế'=>'e','Ế'=>'E','ề'=>'e',
'Ề'=>'E','Ě'=>'e','ě'=>'e','Ë'=>'e','ë'=>'e','Ė'=>'e','ė'=>'e','Ę'=>'e','ę'=>'e','Ē'=>'e',
'ē'=>'e','ệ'=>'e','Ệ'=>'E','Ə'=>'e','ə'=>'e','ẽ'=>'e','Ẽ'=>'E','ễ'=>'e',
'Ễ'=>'E','ể'=>'e','Ể'=>'E','ẻ'=>'e','Ẻ'=>'E','ẹ'=>'e','Ẹ'=>'E',
'ƒ'=>'f',
'Ğ'=>'g','ğ'=>'g','Ĝ'=>'g','ĝ'=>'g','Ǧ'=>'G','ǧ'=>'g','Ġ'=>'g','ġ'=>'g','Ģ'=>'g','ģ'=>'g',
'H̲'=>'H','h̲'=>'h','Ĥ'=>'h','ĥ'=>'h','Ȟ'=>'H','ȟ'=>'h','Ḩ'=>'H','ḩ'=>'h','Ħ'=>'h','ħ'=>'h','Ḥ'=>'H','ḥ'=>'h',
'Ỉ'=>'I','Í'=>'i','í'=>'i','Ì'=>'i','ì'=>'i','Ĭ'=>'i','ĭ'=>'i','Î'=>'i','î'=>'i','Ǐ'=>'i','ǐ'=>'i',
'Ï'=>'i','ï'=>'i','Ḯ'=>'I','ḯ'=>'i','Ĩ'=>'i','ĩ'=>'i','İ'=>'i','Į'=>'i','į'=>'i','Ī'=>'i','ī'=>'i',
'ỉ'=>'I','Ị'=>'I','ị'=>'i','IJ'=>'ij','ij'=>'ij','ı'=>'i',
'Ĵ'=>'j','ĵ'=>'j',
'Ķ'=>'k','ķ'=>'k','Ḵ'=>'K','ḵ'=>'k',
'Ĺ'=>'l','ĺ'=>'l','Ľ'=>'l','ľ'=>'l','Ļ'=>'l','ļ'=>'l','Ł'=>'l','ł'=>'l','Ŀ'=>'l','ŀ'=>'l',
'Ń'=>'n','ń'=>'n','Ň'=>'n','ň'=>'n','Ñ'=>'N','ñ'=>'n','Ņ'=>'n','ņ'=>'n','Ṇ'=>'N','ṇ'=>'n','Ŋ'=>'n','ŋ'=>'n',
'Ó'=>'o','ó'=>'o','Ò'=>'o','ò'=>'o','Ŏ'=>'o','ŏ'=>'o','Ô'=>'o','ô'=>'o','ố'=>'o','Ố'=>'O','ồ'=>'o',
'Ồ'=>'O','ổ'=>'o','Ổ'=>'O','Ǒ'=>'o','ǒ'=>'o','Ö'=>'o','ö'=>'o','Ő'=>'o','ő'=>'o','Õ'=>'o','õ'=>'o',
'Ø'=>'o','ø'=>'o','Ǿ'=>'o','ǿ'=>'o','Ǫ'=>'O','ǫ'=>'o','Ǭ'=>'O','ǭ'=>'o','Ō'=>'o','ō'=>'o','ỏ'=>'o',
'Ỏ'=>'O','Ơ'=>'o','ơ'=>'o','ớ'=>'o','Ớ'=>'O','ờ'=>'o','Ờ'=>'O','ở'=>'o','Ở'=>'O','ợ'=>'o','Ợ'=>'O',
'ọ'=>'o','Ọ'=>'O','ọ'=>'o','Ọ'=>'O','ộ'=>'o','Ộ'=>'O','ỗ'=>'o','Ỗ'=>'O','ỡ'=>'o','Ỡ'=>'O',
'Œ'=>'oe','œ'=>'oe',
'ĸ'=>'k',
'Ŕ'=>'r','ŕ'=>'r','Ř'=>'r','ř'=>'r','ṙ'=>'r','Ŗ'=>'r','ŗ'=>'r','Ṛ'=>'R','ṛ'=>'r','Ṟ'=>'R','ṟ'=>'r',
'S̲'=>'S','s̲'=>'s','Ś'=>'s','ś'=>'s','Ŝ'=>'s','ŝ'=>'s','Š'=>'s','š'=>'s','Ş'=>'s','ş'=>'s',
'Ṣ'=>'S','ṣ'=>'s','Ș'=>'S','ș'=>'s',
'ſ'=>'z','ß'=>'ss','Ť'=>'t','ť'=>'t','Ţ'=>'t','ţ'=>'t','Ṭ'=>'T','ṭ'=>'t','Ț'=>'T',
'ț'=>'t','Ṯ'=>'T','ṯ'=>'t','™'=>'tm','Ŧ'=>'t','ŧ'=>'t',
'Ú'=>'u','ú'=>'u','Ù'=>'u','ù'=>'u','Ŭ'=>'u','ŭ'=>'u','Û'=>'u','û'=>'u','Ǔ'=>'u','ǔ'=>'u','Ů'=>'u','ů'=>'u',
'Ü'=>'u','ü'=>'u','Ǘ'=>'u','ǘ'=>'u','Ǜ'=>'u','ǜ'=>'u','Ǚ'=>'u','ǚ'=>'u','Ǖ'=>'u','ǖ'=>'u','Ű'=>'u','ű'=>'u',
'Ũ'=>'u','ũ'=>'u','Ų'=>'u','ų'=>'u','Ū'=>'u','ū'=>'u','Ư'=>'u','ư'=>'u','ứ'=>'u','Ứ'=>'U','ừ'=>'u','Ừ'=>'U',
'ử'=>'u','Ử'=>'U','ự'=>'u','Ự'=>'U','ụ'=>'u','Ụ'=>'U','ủ'=>'u','Ủ'=>'U','ữ'=>'u','Ữ'=>'U',
'Ŵ'=>'w','ŵ'=>'w',
'Ý'=>'y','ý'=>'y','ỳ'=>'y','Ỳ'=>'Y','Ŷ'=>'y','ŷ'=>'y','ÿ'=>'y','Ÿ'=>'y','ỹ'=>'y','Ỹ'=>'Y','ỷ'=>'y','Ỷ'=>'Y',
'Z̲'=>'Z','z̲'=>'z','Ź'=>'z','ź'=>'z','Ž'=>'z','ž'=>'z','Ż'=>'z','ż'=>'z','Ẕ'=>'Z','ẕ'=>'z',
'þ'=>'p','ʼn'=>'n','А'=>'a','а'=>'a','Б'=>'b','б'=>'b','В'=>'v','в'=>'v','Г'=>'g','г'=>'g','Ґ'=>'g','ґ'=>'g',
'Д'=>'d','д'=>'d','Е'=>'e','е'=>'e','Ё'=>'jo','ё'=>'jo','Є'=>'e','є'=>'e','Ж'=>'zh','ж'=>'zh','З'=>'z','з'=>'z',
'И'=>'i','и'=>'i','І'=>'i','і'=>'i','Ї'=>'i','ї'=>'i','Й'=>'j','й'=>'j','К'=>'k','к'=>'k','Л'=>'l','л'=>'l',
'М'=>'m','м'=>'m','Н'=>'n','н'=>'n','О'=>'o','о'=>'o','П'=>'p','п'=>'p','Р'=>'r','р'=>'r','С'=>'s','с'=>'s',
'Т'=>'t','т'=>'t','У'=>'u','у'=>'u','Ф'=>'f','ф'=>'f','Х'=>'h','х'=>'h','Ц'=>'c','ц'=>'c','Ч'=>'ch','ч'=>'ch',
'Ш'=>'sh','ш'=>'sh','Щ'=>'sch','щ'=>'sch','Ъ'=>'-',
'ъ'=>'-','Ы'=>'y','ы'=>'y','Ь'=>'-','ь'=>'-',
'Э'=>'je','э'=>'je','Ю'=>'ju','ю'=>'ju','Я'=>'ja','я'=>'ja','א'=>'a','ב'=>'b','ג'=>'g','ד'=>'d','ה'=>'h','ו'=>'v',
'ז'=>'z','ח'=>'h','ט'=>'t','י'=>'i','ך'=>'k','כ'=>'k','ל'=>'l','ם'=>'m','מ'=>'m','ן'=>'n','נ'=>'n','ס'=>'s','ע'=>'e',
'ף'=>'p','פ'=>'p','ץ'=>'C','צ'=>'c','ק'=>'q','ר'=>'r','ש'=>'w','ת'=>'t'
);

$accentsRemoved = strtr( $stringToRemoveAccents , $unwanted_array );