remove_accents( string $string )

Converts all accent characters to ASCII characters.

Contents

Description Description

If there are no accent characters, then the string given is just returned.

Accent characters converted:

Currency signs:

Code Glyph Replacement Description
U+00A3 £ (empty) British Pound sign
U+20AC € E Euro sign

Decompositions for Latin-1 Supplement:

Code Glyph Replacement Description
U+00AA ª a Feminine ordinal indicator
U+00BA º o Masculine ordinal indicator
U+00C0 À A Latin capital letter A with grave
U+00C1 Á A Latin capital letter A with acute
U+00C2 Â A Latin capital letter A with circumflex
U+00C3 Ã A Latin capital letter A with tilde
U+00C4 Ä A Latin capital letter A with diaeresis
U+00C5 Å A Latin capital letter A with ring above
U+00C6 Æ AE Latin capital letter AE
U+00C7 Ç C Latin capital letter C with cedilla
U+00C8 È E Latin capital letter E with grave
U+00C9 É E Latin capital letter E with acute
U+00CA Ê E Latin capital letter E with circumflex
U+00CB Ë E Latin capital letter E with diaeresis
U+00CC Ì I Latin capital letter I with grave
U+00CD Í I Latin capital letter I with acute
U+00CE Î I Latin capital letter I with circumflex
U+00CF Ï I Latin capital letter I with diaeresis
U+00D0 Ð D Latin capital letter Eth
U+00D1 Ñ N Latin capital letter N with tilde
U+00D2 Ò O Latin capital letter O with grave
U+00D3 Ó O Latin capital letter O with acute
U+00D4 Ô O Latin capital letter O with circumflex
U+00D5 Õ O Latin capital letter O with tilde
U+00D6 Ö O Latin capital letter O with diaeresis
U+00D8 Ø O Latin capital letter O with stroke
U+00D9 Ù U Latin capital letter U with grave
U+00DA Ú U Latin capital letter U with acute
U+00DB Û U Latin capital letter U with circumflex
U+00DC Ü U Latin capital letter U with diaeresis
U+00DD Ý Y Latin capital letter Y with acute
U+00DE Þ TH Latin capital letter Thorn
U+00DF ß s Latin small letter sharp s
U+00E0 à a Latin small letter a with grave
U+00E1 á a Latin small letter a with acute
U+00E2 â a Latin small letter a with circumflex
U+00E3 ã a Latin small letter a with tilde
U+00E4 ä a Latin small letter a with diaeresis
U+00E5 å a Latin small letter a with ring above
U+00E6 æ ae Latin small letter ae
U+00E7 ç c Latin small letter c with cedilla
U+00E8 è e Latin small letter e with grave
U+00E9 é e Latin small letter e with acute
U+00EA ê e Latin small letter e with circumflex
U+00EB ë e Latin small letter e with diaeresis
U+00EC ì i Latin small letter i with grave
U+00ED í i Latin small letter i with acute
U+00EE î i Latin small letter i with circumflex
U+00EF ï i Latin small letter i with diaeresis
U+00F0 ð d Latin small letter Eth
U+00F1 ñ n Latin small letter n with tilde
U+00F2 ò o Latin small letter o with grave
U+00F3 ó o Latin small letter o with acute
U+00F4 ô o Latin small letter o with circumflex
U+00F5 õ o Latin small letter o with tilde
U+00F6 ö o Latin small letter o with diaeresis
U+00F8 ø o Latin small letter o with stroke
U+00F9 ù u Latin small letter u with grave
U+00FA ú u Latin small letter u with acute
U+00FB û u Latin small letter u with circumflex
U+00FC ü u Latin small letter u with diaeresis
U+00FD ý y Latin small letter y with acute
U+00FE þ th Latin small letter Thorn
U+00FF ÿ y Latin small letter y with diaeresis

Decompositions for Latin Extended-A:

Code Glyph Replacement Description
U+0100 Ā A Latin capital letter A with macron
U+0101 ā a Latin small letter a with macron
U+0102 Ă A Latin capital letter A with breve
U+0103 ă a Latin small letter a with breve
U+0104 Ą A Latin capital letter A with ogonek
U+0105 ą a Latin small letter a with ogonek
U+01006 Ć C Latin capital letter C with acute
U+0107 ć c Latin small letter c with acute
U+0108 Ĉ C Latin capital letter C with circumflex
U+0109 ĉ c Latin small letter c with circumflex
U+010A Ċ C Latin capital letter C with dot above
U+010B ċ c Latin small letter c with dot above
U+010C Č C Latin capital letter C with caron
U+010D č c Latin small letter c with caron
U+010E Ď D Latin capital letter D with caron
U+010F ď d Latin small letter d with caron
U+0110 Đ D Latin capital letter D with stroke
U+0111 đ d Latin small letter d with stroke
U+0112 Ē E Latin capital letter E with macron
U+0113 ē e Latin small letter e with macron
U+0114 Ĕ E Latin capital letter E with breve
U+0115 ĕ e Latin small letter e with breve
U+0116 Ė E Latin capital letter E with dot above
U+0117 ė e Latin small letter e with dot above
U+0118 Ę E Latin capital letter E with ogonek
U+0119 ę e Latin small letter e with ogonek
U+011A Ě E Latin capital letter E with caron
U+011B ě e Latin small letter e with caron
U+011C Ĝ G Latin capital letter G with circumflex
U+011D ĝ g Latin small letter g with circumflex
U+011E Ğ G Latin capital letter G with breve
U+011F ğ g Latin small letter g with breve
U+0120 Ġ G Latin capital letter G with dot above
U+0121 ġ g Latin small letter g with dot above
U+0122 Ģ G Latin capital letter G with cedilla
U+0123 ģ g Latin small letter g with cedilla
U+0124 Ĥ H Latin capital letter H with circumflex
U+0125 ĥ h Latin small letter h with circumflex
U+0126 Ħ H Latin capital letter H with stroke
U+0127 ħ h Latin small letter h with stroke
U+0128 Ĩ I Latin capital letter I with tilde
U+0129 ĩ i Latin small letter i with tilde
U+012A Ī I Latin capital letter I with macron
U+012B ī i Latin small letter i with macron
U+012C Ĭ I Latin capital letter I with breve
U+012D ĭ i Latin small letter i with breve
U+012E Į I Latin capital letter I with ogonek
U+012F į i Latin small letter i with ogonek
U+0130 İ I Latin capital letter I with dot above
U+0131 ı i Latin small letter dotless i
U+0132 IJ IJ Latin capital ligature IJ
U+0133 ij ij Latin small ligature ij
U+0134 Ĵ J Latin capital letter J with circumflex
U+0135 ĵ j Latin small letter j with circumflex
U+0136 Ķ K Latin capital letter K with cedilla
U+0137 ķ k Latin small letter k with cedilla
U+0138 ĸ k Latin small letter Kra
U+0139 Ĺ L Latin capital letter L with acute
U+013A ĺ l Latin small letter l with acute
U+013B Ļ L Latin capital letter L with cedilla
U+013C ļ l Latin small letter l with cedilla
U+013D Ľ L Latin capital letter L with caron
U+013E ľ l Latin small letter l with caron
U+013F Ŀ L Latin capital letter L with middle dot
U+0140 ŀ l Latin small letter l with middle dot
U+0141 Ł L Latin capital letter L with stroke
U+0142 ł l Latin small letter l with stroke
U+0143 Ń N Latin capital letter N with acute
U+0144 ń n Latin small letter N with acute
U+0145 Ņ N Latin capital letter N with cedilla
U+0146 ņ n Latin small letter n with cedilla
U+0147 Ň N Latin capital letter N with caron
U+0148 ň n Latin small letter n with caron
U+0149 ʼn n Latin small letter n preceded by apostrophe
U+014A Ŋ N Latin capital letter Eng
U+014B ŋ n Latin small letter Eng
U+014C Ō O Latin capital letter O with macron
U+014D ō o Latin small letter o with macron
U+014E Ŏ O Latin capital letter O with breve
U+014F ŏ o Latin small letter o with breve
U+0150 Ő O Latin capital letter O with double acute
U+0151 ő o Latin small letter o with double acute
U+0152 ΠOE Latin capital ligature OE
U+0153 œ oe Latin small ligature oe
U+0154 Ŕ R Latin capital letter R with acute
U+0155 ŕ r Latin small letter r with acute
U+0156 Ŗ R Latin capital letter R with cedilla
U+0157 ŗ r Latin small letter r with cedilla
U+0158 Ř R Latin capital letter R with caron
U+0159 ř r Latin small letter r with caron
U+015A Ś S Latin capital letter S with acute
U+015B ś s Latin small letter s with acute
U+015C Ŝ S Latin capital letter S with circumflex
U+015D ŝ s Latin small letter s with circumflex
U+015E Ş S Latin capital letter S with cedilla
U+015F ş s Latin small letter s with cedilla
U+0160 Š S Latin capital letter S with caron
U+0161 š s Latin small letter s with caron
U+0162 Ţ T Latin capital letter T with cedilla
U+0163 ţ t Latin small letter t with cedilla
U+0164 Ť T Latin capital letter T with caron
U+0165 ť t Latin small letter t with caron
U+0166 Ŧ T Latin capital letter T with stroke
U+0167 ŧ t Latin small letter t with stroke
U+0168 Ũ U Latin capital letter U with tilde
U+0169 ũ u Latin small letter u with tilde
U+016A Ū U Latin capital letter U with macron
U+016B ū u Latin small letter u with macron
U+016C Ŭ U Latin capital letter U with breve
U+016D ŭ u Latin small letter u with breve
U+016E Ů U Latin capital letter U with ring above
U+016F ů u Latin small letter u with ring above
U+0170 Ű U Latin capital letter U with double acute
U+0171 ű u Latin small letter u with double acute
U+0172 Ų U Latin capital letter U with ogonek
U+0173 ų u Latin small letter u with ogonek
U+0174 Ŵ W Latin capital letter W with circumflex
U+0175 ŵ w Latin small letter w with circumflex
U+0176 Ŷ Y Latin capital letter Y with circumflex
U+0177 ŷ y Latin small letter y with circumflex
U+0178 Ÿ Y Latin capital letter Y with diaeresis
U+0179 Ź Z Latin capital letter Z with acute
U+017A ź z Latin small letter z with acute
U+017B Ż Z Latin capital letter Z with dot above
U+017C ż z Latin small letter z with dot above
U+017D Ž Z Latin capital letter Z with caron
U+017E ž z Latin small letter z with caron
U+017F ſ s Latin small letter long s
U+01A0 Ơ O Latin capital letter O with horn
U+01A1 ơ o Latin small letter o with horn
U+01AF Ư U Latin capital letter U with horn
U+01B0 ư u Latin small letter u with horn
U+01CD Ǎ A Latin capital letter A with caron
U+01CE ǎ a Latin small letter a with caron
U+01CF Ǐ I Latin capital letter I with caron
U+01D0 ǐ i Latin small letter i with caron
U+01D1 Ǒ O Latin capital letter O with caron
U+01D2 ǒ o Latin small letter o with caron
U+01D3 Ǔ U Latin capital letter U with caron
U+01D4 ǔ u Latin small letter u with caron
U+01D5 Ǖ U Latin capital letter U with diaeresis and macron
U+01D6 ǖ u Latin small letter u with diaeresis and macron
U+01D7 Ǘ U Latin capital letter U with diaeresis and acute
U+01D8 ǘ u Latin small letter u with diaeresis and acute
U+01D9 Ǚ U Latin capital letter U with diaeresis and caron
U+01DA ǚ u Latin small letter u with diaeresis and caron
U+01DB Ǜ U Latin capital letter U with diaeresis and grave
U+01DC ǜ u Latin small letter u with diaeresis and grave

Decompositions for Latin Extended-B:

Code Glyph Replacement Description
U+0218 Ș S Latin capital letter S with comma below
U+0219 ș s Latin small letter s with comma below
U+021A Ț T Latin capital letter T with comma below
U+021B ț t Latin small letter t with comma below

Vowels with diacritic (Chinese, Hanyu Pinyin):

Code Glyph Replacement Description
U+0251 ɑ a Latin small letter alpha
U+1EA0 Ạ A Latin capital letter A with dot below
U+1EA1 ạ a Latin small letter a with dot below
U+1EA2 Ả A Latin capital letter A with hook above
U+1EA3 ả a Latin small letter a with hook above
U+1EA4 Ấ A Latin capital letter A with circumflex and acute
U+1EA5 ấ a Latin small letter a with circumflex and acute
U+1EA6 Ầ A Latin capital letter A with circumflex and grave
U+1EA7 ầ a Latin small letter a with circumflex and grave
U+1EA8 Ẩ A Latin capital letter A with circumflex and hook above
U+1EA9 ẩ a Latin small letter a with circumflex and hook above
U+1EAA Ẫ A Latin capital letter A with circumflex and tilde
U+1EAB ẫ a Latin small letter a with circumflex and tilde
U+1EA6 Ậ A Latin capital letter A with circumflex and dot below
U+1EAD ậ a Latin small letter a with circumflex and dot below
U+1EAE Ắ A Latin capital letter A with breve and acute
U+1EAF ắ a Latin small letter a with breve and acute
U+1EB0 Ằ A Latin capital letter A with breve and grave
U+1EB1 ằ a Latin small letter a with breve and grave
U+1EB2 Ẳ A Latin capital letter A with breve and hook above
U+1EB3 ẳ a Latin small letter a with breve and hook above
U+1EB4 Ẵ A Latin capital letter A with breve and tilde
U+1EB5 ẵ a Latin small letter a with breve and tilde
U+1EB6 Ặ A Latin capital letter A with breve and dot below
U+1EB7 ặ a Latin small letter a with breve and dot below
U+1EB8 Ẹ E Latin capital letter E with dot below
U+1EB9 ẹ e Latin small letter e with dot below
U+1EBA Ẻ E Latin capital letter E with hook above
U+1EBB ẻ e Latin small letter e with hook above
U+1EBC Ẽ E Latin capital letter E with tilde
U+1EBD ẽ e Latin small letter e with tilde
U+1EBE Ế E Latin capital letter E with circumflex and acute
U+1EBF ế e Latin small letter e with circumflex and acute
U+1EC0 Ề E Latin capital letter E with circumflex and grave
U+1EC1 ề e Latin small letter e with circumflex and grave
U+1EC2 Ể E Latin capital letter E with circumflex and hook above
U+1EC3 ể e Latin small letter e with circumflex and hook above
U+1EC4 Ễ E Latin capital letter E with circumflex and tilde
U+1EC5 ễ e Latin small letter e with circumflex and tilde
U+1EC6 Ệ E Latin capital letter E with circumflex and dot below
U+1EC7 ệ e Latin small letter e with circumflex and dot below
U+1EC8 Ỉ I Latin capital letter I with hook above
U+1EC9 ỉ i Latin small letter i with hook above
U+1ECA Ị I Latin capital letter I with dot below
U+1ECB ị i Latin small letter i with dot below
U+1ECC Ọ O Latin capital letter O with dot below
U+1ECD ọ o Latin small letter o with dot below
U+1ECE Ỏ O Latin capital letter O with hook above
U+1ECF ỏ o Latin small letter o with hook above
U+1ED0 Ố O Latin capital letter O with circumflex and acute
U+1ED1 ố o Latin small letter o with circumflex and acute
U+1ED2 Ồ O Latin capital letter O with circumflex and grave
U+1ED3 ồ o Latin small letter o with circumflex and grave
U+1ED4 Ổ O Latin capital letter O with circumflex and hook above
U+1ED5 ổ o Latin small letter o with circumflex and hook above
U+1ED6 Ỗ O Latin capital letter O with circumflex and tilde
U+1ED7 ỗ o Latin small letter o with circumflex and tilde
U+1ED8 Ộ O Latin capital letter O with circumflex and dot below
U+1ED9 ộ o Latin small letter o with circumflex and dot below
U+1EDA Ớ O Latin capital letter O with horn and acute
U+1EDB ớ o Latin small letter o with horn and acute
U+1EDC Ờ O Latin capital letter O with horn and grave
U+1EDD ờ o Latin small letter o with horn and grave
U+1EDE Ở O Latin capital letter O with horn and hook above
U+1EDF ở o Latin small letter o with horn and hook above
U+1EE0 Ỡ O Latin capital letter O with horn and tilde
U+1EE1 ỡ o Latin small letter o with horn and tilde
U+1EE2 Ợ O Latin capital letter O with horn and dot below
U+1EE3 ợ o Latin small letter o with horn and dot below
U+1EE4 Ụ U Latin capital letter U with dot below
U+1EE5 ụ u Latin small letter u with dot below
U+1EE6 Ủ U Latin capital letter U with hook above
U+1EE7 ủ u Latin small letter u with hook above
U+1EE8 Ứ U Latin capital letter U with horn and acute
U+1EE9 ứ u Latin small letter u with horn and acute
U+1EEA Ừ U Latin capital letter U with horn and grave
U+1EEB ừ u Latin small letter u with horn and grave
U+1EEC Ử U Latin capital letter U with horn and hook above
U+1EED ử u Latin small letter u with horn and hook above
U+1EEE Ữ U Latin capital letter U with horn and tilde
U+1EEF ữ u Latin small letter u with horn and tilde
U+1EF0 Ự U Latin capital letter U with horn and dot below
U+1EF1 ự u Latin small letter u with horn and dot below
U+1EF2 Ỳ Y Latin capital letter Y with grave
U+1EF3 ỳ y Latin small letter y with grave
U+1EF4 Ỵ Y Latin capital letter Y with dot below
U+1EF5 ỵ y Latin small letter y with dot below
U+1EF6 Ỷ Y Latin capital letter Y with hook above
U+1EF7 ỷ y Latin small letter y with hook above
U+1EF8 Ỹ Y Latin capital letter Y with tilde
U+1EF9 ỹ y Latin small letter y with tilde

German (de_DE), German formal (de_DE_formal), German (Switzerland) formal (de_CH), and German (Switzerland) informal (de_CH_informal) locales:

Code Glyph Replacement Description
U+00C4 Ä Ae Latin capital letter A with diaeresis
U+00E4 ä ae Latin small letter a with diaeresis
U+00D6 Ö Oe Latin capital letter O with diaeresis
U+00F6 ö oe Latin small letter o with diaeresis
U+00DC Ü Ue Latin capital letter U with diaeresis
U+00FC ü ue Latin small letter u with diaeresis
U+00DF ß ss Latin small letter sharp s

Danish (da_DK) locale:

Code Glyph Replacement Description
U+00C6 Æ Ae Latin capital letter AE
U+00E6 æ ae Latin small letter ae
U+00D8 Ø Oe Latin capital letter O with stroke
U+00F8 ø oe Latin small letter o with stroke
U+00C5 Å Aa Latin capital letter A with ring above
U+00E5 å aa Latin small letter a with ring above

Catalan (ca) locale:

Code Glyph Replacement Description
U+00B7 l·l ll Flown dot (between two Ls)

Serbian (sr_RS) and Bosnian (bs_BA) locales:

Code Glyph Replacement Description
U+0110 Đ DJ Latin capital letter D with stroke
U+0111 đ dj Latin small letter d with stroke

Parameters Parameters

$string

(string) (Required) Text that might have accent characters

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Return Return

(string) Filtered string with replaced "nice" characters.

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Source Source

File: wp-includes/formatting.php

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function remove_accents( $string ) {
    if ( ! preg_match( '/[\x80-\xff]/', $string ) ) {
        return $string;
    }
 
    if ( seems_utf8( $string ) ) {
        $chars = array(
            // Decompositions for Latin-1 Supplement
            'ª' => 'a',
            'º' => 'o',
            'À' => 'A',
            'Á' => 'A',
            'Â' => 'A',
            'Ã' => 'A',
            'Ä' => 'A',
            'Å' => 'A',
            'Æ' => 'AE',
            'Ç' => 'C',
            'È' => 'E',
            'É' => 'E',
            'Ê' => 'E',
            'Ë' => 'E',
            'Ì' => 'I',
            'Í' => 'I',
            'Î' => 'I',
            'Ï' => 'I',
            'Ð' => 'D',
            'Ñ' => 'N',
            'Ò' => 'O',
            'Ó' => 'O',
            'Ô' => 'O',
            'Õ' => 'O',
            'Ö' => 'O',
            'Ù' => 'U',
            'Ú' => 'U',
            'Û' => 'U',
            'Ü' => 'U',
            'Ý' => 'Y',
            'Þ' => 'TH',
            'ß' => 's',
            'à' => 'a',
            'á' => 'a',
            'â' => 'a',
            'ã' => 'a',
            'ä' => 'a',
            'å' => 'a',
            'æ' => 'ae',
            'ç' => 'c',
            'è' => 'e',
            'é' => 'e',
            'ê' => 'e',
            'ë' => 'e',
            'ì' => 'i',
            'í' => 'i',
            'î' => 'i',
            'ï' => 'i',
            'ð' => 'd',
            'ñ' => 'n',
            'ò' => 'o',
            'ó' => 'o',
            'ô' => 'o',
            'õ' => 'o',
            'ö' => 'o',
            'ø' => 'o',
            'ù' => 'u',
            'ú' => 'u',
            'û' => 'u',
            'ü' => 'u',
            'ý' => 'y',
            'þ' => 'th',
            'ÿ' => 'y',
            'Ø' => 'O',
            // Decompositions for Latin Extended-A
            'Ā' => 'A',
            'ā' => 'a',
            'Ă' => 'A',
            'ă' => 'a',
            'Ą' => 'A',
            'ą' => 'a',
            'Ć' => 'C',
            'ć' => 'c',
            'Ĉ' => 'C',
            'ĉ' => 'c',
            'Ċ' => 'C',
            'ċ' => 'c',
            'Č' => 'C',
            'č' => 'c',
            'Ď' => 'D',
            'ď' => 'd',
            'Đ' => 'D',
            'đ' => 'd',
            'Ē' => 'E',
            'ē' => 'e',
            'Ĕ' => 'E',
            'ĕ' => 'e',
            'Ė' => 'E',
            'ė' => 'e',
            'Ę' => 'E',
            'ę' => 'e',
            'Ě' => 'E',
            'ě' => 'e',
            'Ĝ' => 'G',
            'ĝ' => 'g',
            'Ğ' => 'G',
            'ğ' => 'g',
            'Ġ' => 'G',
            'ġ' => 'g',
            'Ģ' => 'G',
            'ģ' => 'g',
            'Ĥ' => 'H',
            'ĥ' => 'h',
            'Ħ' => 'H',
            'ħ' => 'h',
            'Ĩ' => 'I',
            'ĩ' => 'i',
            'Ī' => 'I',
            'ī' => 'i',
            'Ĭ' => 'I',
            'ĭ' => 'i',
            'Į' => 'I',
            'į' => 'i',
            'İ' => 'I',
            'ı' => 'i',
            'IJ' => 'IJ',
            'ij' => 'ij',
            'Ĵ' => 'J',
            'ĵ' => 'j',
            'Ķ' => 'K',
            'ķ' => 'k',
            'ĸ' => 'k',
            'Ĺ' => 'L',
            'ĺ' => 'l',
            'Ļ' => 'L',
            'ļ' => 'l',
            'Ľ' => 'L',
            'ľ' => 'l',
            'Ŀ' => 'L',
            'ŀ' => 'l',
            'Ł' => 'L',
            'ł' => 'l',
            'Ń' => 'N',
            'ń' => 'n',
            'Ņ' => 'N',
            'ņ' => 'n',
            'Ň' => 'N',
            'ň' => 'n',
            'ʼn' => 'n',
            'Ŋ' => 'N',
            'ŋ' => 'n',
            'Ō' => 'O',
            'ō' => 'o',
            'Ŏ' => 'O',
            'ŏ' => 'o',
            'Ő' => 'O',
            'ő' => 'o',
            'Œ' => 'OE',
            'œ' => 'oe',
            'Ŕ' => 'R',
            'ŕ' => 'r',
            'Ŗ' => 'R',
            'ŗ' => 'r',
            'Ř' => 'R',
            'ř' => 'r',
            'Ś' => 'S',
            'ś' => 's',
            'Ŝ' => 'S',
            'ŝ' => 's',
            'Ş' => 'S',
            'ş' => 's',
            'Š' => 'S',
            'š' => 's',
            'Ţ' => 'T',
            'ţ' => 't',
            'Ť' => 'T',
            'ť' => 't',
            'Ŧ' => 'T',
            'ŧ' => 't',
            'Ũ' => 'U',
            'ũ' => 'u',
            'Ū' => 'U',
            'ū' => 'u',
            'Ŭ' => 'U',
            'ŭ' => 'u',
            'Ů' => 'U',
            'ů' => 'u',
            'Ű' => 'U',
            'ű' => 'u',
            'Ų' => 'U',
            'ų' => 'u',
            'Ŵ' => 'W',
            'ŵ' => 'w',
            'Ŷ' => 'Y',
            'ŷ' => 'y',
            'Ÿ' => 'Y',
            'Ź' => 'Z',
            'ź' => 'z',
            'Ż' => 'Z',
            'ż' => 'z',
            'Ž' => 'Z',
            'ž' => 'z',
            'ſ' => 's',
            // Decompositions for Latin Extended-B
            'Ș' => 'S',
            'ș' => 's',
            'Ț' => 'T',
            'ț' => 't',
            // Euro Sign
            '€' => 'E',
            // GBP (Pound) Sign
            '£' => '',
            // Vowels with diacritic (Vietnamese)
            // unmarked
            'Ơ' => 'O',
            'ơ' => 'o',
            'Ư' => 'U',
            'ư' => 'u',
            // grave accent
            'Ầ' => 'A',
            'ầ' => 'a',
            'Ằ' => 'A',
            'ằ' => 'a',
            'Ề' => 'E',
            'ề' => 'e',
            'Ồ' => 'O',
            'ồ' => 'o',
            'Ờ' => 'O',
            'ờ' => 'o',
            'Ừ' => 'U',
            'ừ' => 'u',
            'Ỳ' => 'Y',
            'ỳ' => 'y',
            // hook
            'Ả' => 'A',
            'ả' => 'a',
            'Ẩ' => 'A',
            'ẩ' => 'a',
            'Ẳ' => 'A',
            'ẳ' => 'a',
            'Ẻ' => 'E',
            'ẻ' => 'e',
            'Ể' => 'E',
            'ể' => 'e',
            'Ỉ' => 'I',
            'ỉ' => 'i',
            'Ỏ' => 'O',
            'ỏ' => 'o',
            'Ổ' => 'O',
            'ổ' => 'o',
            'Ở' => 'O',
            'ở' => 'o',
            'Ủ' => 'U',
            'ủ' => 'u',
            'Ử' => 'U',
            'ử' => 'u',
            'Ỷ' => 'Y',
            'ỷ' => 'y',
            // tilde
            'Ẫ' => 'A',
            'ẫ' => 'a',
            'Ẵ' => 'A',
            'ẵ' => 'a',
            'Ẽ' => 'E',
            'ẽ' => 'e',
            'Ễ' => 'E',
            'ễ' => 'e',
            'Ỗ' => 'O',
            'ỗ' => 'o',
            'Ỡ' => 'O',
            'ỡ' => 'o',
            'Ữ' => 'U',
            'ữ' => 'u',
            'Ỹ' => 'Y',
            'ỹ' => 'y',
            // acute accent
            'Ấ' => 'A',
            'ấ' => 'a',
            'Ắ' => 'A',
            'ắ' => 'a',
            'Ế' => 'E',
            'ế' => 'e',
            'Ố' => 'O',
            'ố' => 'o',
            'Ớ' => 'O',
            'ớ' => 'o',
            'Ứ' => 'U',
            'ứ' => 'u',
            // dot below
            'Ạ' => 'A',
            'ạ' => 'a',
            'Ậ' => 'A',
            'ậ' => 'a',
            'Ặ' => 'A',
            'ặ' => 'a',
            'Ẹ' => 'E',
            'ẹ' => 'e',
            'Ệ' => 'E',
            'ệ' => 'e',
            'Ị' => 'I',
            'ị' => 'i',
            'Ọ' => 'O',
            'ọ' => 'o',
            'Ộ' => 'O',
            'ộ' => 'o',
            'Ợ' => 'O',
            'ợ' => 'o',
            'Ụ' => 'U',
            'ụ' => 'u',
            'Ự' => 'U',
            'ự' => 'u',
            'Ỵ' => 'Y',
            'ỵ' => 'y',
            // Vowels with diacritic (Chinese, Hanyu Pinyin)
            'ɑ' => 'a',
            // macron
            'Ǖ' => 'U',
            'ǖ' => 'u',
            // acute accent
            'Ǘ' => 'U',
            'ǘ' => 'u',
            // caron
            'Ǎ' => 'A',
            'ǎ' => 'a',
            'Ǐ' => 'I',
            'ǐ' => 'i',
            'Ǒ' => 'O',
            'ǒ' => 'o',
            'Ǔ' => 'U',
            'ǔ' => 'u',
            'Ǚ' => 'U',
            'ǚ' => 'u',
            // grave accent
            'Ǜ' => 'U',
            'ǜ' => 'u',
        );
 
        // Used for locale-specific rules
        $locale = get_locale();
 
        if ( 'de_DE' == $locale || 'de_DE_formal' == $locale || 'de_CH' == $locale || 'de_CH_informal' == $locale ) {
            $chars['Ä'] = 'Ae';
            $chars['ä'] = 'ae';
            $chars['Ö'] = 'Oe';
            $chars['ö'] = 'oe';
            $chars['Ü'] = 'Ue';
            $chars['ü'] = 'ue';
            $chars['ß'] = 'ss';
        } elseif ( 'da_DK' === $locale ) {
            $chars['Æ'] = 'Ae';
            $chars['æ'] = 'ae';
            $chars['Ø'] = 'Oe';
            $chars['ø'] = 'oe';
            $chars['Å'] = 'Aa';
            $chars['å'] = 'aa';
        } elseif ( 'ca' === $locale ) {
            $chars['l·l'] = 'll';
        } elseif ( 'sr_RS' === $locale || 'bs_BA' === $locale ) {
            $chars['Đ'] = 'DJ';
            $chars['đ'] = 'dj';
        }
 
        $string = strtr( $string, $chars );
    } else {
        $chars = array();
        // Assume ISO-8859-1 if not UTF-8
        $chars['in'] = "\x80\x83\x8a\x8e\x9a\x9e"
            . "\x9f\xa2\xa5\xb5\xc0\xc1\xc2"
            . "\xc3\xc4\xc5\xc7\xc8\xc9\xca"
            . "\xcb\xcc\xcd\xce\xcf\xd1\xd2"
            . "\xd3\xd4\xd5\xd6\xd8\xd9\xda"
            . "\xdb\xdc\xdd\xe0\xe1\xe2\xe3"
            . "\xe4\xe5\xe7\xe8\xe9\xea\xeb"
            . "\xec\xed\xee\xef\xf1\xf2\xf3"
            . "\xf4\xf5\xf6\xf8\xf9\xfa\xfb"
            . "\xfc\xfd\xff";
 
        $chars['out'] = 'EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy';
 
        $string              = strtr( $string, $chars['in'], $chars['out'] );
        $double_chars        = array();
        $double_chars['in']  = array( "\x8c", "\x9c", "\xc6", "\xd0", "\xde", "\xdf", "\xe6", "\xf0", "\xfe" );
        $double_chars['out'] = array( 'OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th' );
        $string              = str_replace( $double_chars['in'], $double_chars['out'], $string );
    }
 
    return $string;
}

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Changelog Changelog

Changelog
Version Description
4.8.0 Added locale support for bs_BA.
4.7.0 Added locale support for sr_RS.
4.6.0 Added locale support for de_CH, de_CH_informal, and ca.
1.2.1 Introduced.

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Uses Uses

Uses
Uses Description
wp-includes/l10n.php: get_locale()

Retrieves the current locale.
wp-includes/formatting.php: seems_utf8()

Checks to see if a string is utf8 encoded.

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Used By Used By

Used By
Used By Description
wp-includes/formatting.php: sanitize_user()

Sanitizes a username, stripping out unsafe characters.
wp-includes/formatting.php: sanitize_title()

Sanitizes a title, or returns a fallback title.

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