(PHP 4, PHP 5, PHP 7, PHP 8)

get_html_translation_tableDevuelve la tabla de traducción utilizada por htmlspecialchars() y htmlentities()


get_html_translation_table(int $table = HTML_SPECIALCHARS, int $flags = ENT_COMPAT | ENT_HTML401, string $encoding = "UTF-8"): array

get_html_translation_table() devolverá la tabla de traducción que es utilizada internamente para htmlspecialchars() y htmlentities().


Los caracteres especiales se pueden codificar de varias maneras. Por ejemplo, " puede ser codificado como ", " o &#x22. get_html_translation_table() devuelve sólo la forma utilizada por htmlspecialchars() y htmlentities().



Qué tabla devolver. Puede ser HTML_ENTITIES o HTML_SPECIALCHARS).


Una máscara de bits de uno o más de los siguientes indicadores especificando qué comillas contendrá la tabla, así como para qué tipo de documento será la tabla. El valor por defecto es ENT_COMPAT | ENT_HTML401.

Constantes disponibles para flags
Nombre de la constante Descripción
ENT_COMPAT La tabla contendrá entidades para comillas dobles, pero no para comillas simples.
ENT_QUOTES La tabla contendrá entidades para comillas dobles y simples.
ENT_NOQUOTES La tabla no contendrá entidades para comillas simples ni para comillas dobles.
ENT_HTML401 Tabla para HTML 4.01.
ENT_XML1 Tabla para XML 1.
ENT_HTML5 Tabla para HTML 5.


La codificación a usar. Si se omite, el valor por defecto para este argumento es ISO-8859-1 en versiones de PHP anteriores a 5.4.0, y UTF-8 a partir de PHP 5.4.0 en adelante.

Están soportados los siguientes juegos de caracteres:

Juegos de caracteres soportados
Juego de caracteres Alias Descripción
ISO-8859-1 ISO8859-1 Europeo occidental, Latin-1.
ISO-8859-5 ISO8859-5 Juego de caracteres cirílicos poco usado (Latin/Cyrillic).
ISO-8859-15 ISO8859-15 Europeo occidental, Latin-9. Añade el signo de euro, y letras del francés y finlandés ausentes en Latin-1 (ISO-8859-1).
UTF-8   Unicode de 8 bit multibyte compatible con ASCII.
cp866 ibm866, 866 Juego de caracteres cirílico específico de DOS.
cp1251 Windows-1251, win-1251, 1251 Juego de caracteres cirílico específico de Windows.
cp1252 Windows-1252, 1252 Juego de caracteres específico de Windows para Europa occidental.
KOI8-R koi8-ru, koi8r Ruso.
BIG5 950 Chino tradicional, usado principalmente en Taiwán.
GB2312 936 Chino simplificado, juego de caracteres estándar nacional.
BIG5-HKSCS   Big5 con extensiones de Hong Kong, chino tradicional.
Shift_JIS SJIS, SJIS-win, cp932, 932 Japonés
EUC-JP EUCJP, eucJP-win Japonés
MacRoman   Juego de caracteres que fue utilizado por Mac OS.
''   Un string vacío activa la detección desde la codificación del script (Zend multibyte), default_charset y la actual configuración regional (véase nl_langinfo() y setlocale()), en este orden. No se recomienda.

Nota: No se reconoce cualquier otro juego de caracteres. Será utilizada en su lugar la codificación por defecto y se emitirá una advertencia.

Valores devueltos

Devuelve la tabla de traducción como un array, con los caracteres originales como claves y las entidades como valores.

Historial de cambios

Versión Descripción
5.4.0 El valor por defecto para el parámetro encoding se cambió a UTF-8.
5.4.0 Se añadieron las constantes ENT_HTML401, ENT_XML1, ENT_XHTML y ENT_HTML5.
5.3.4 Se añadió el parámetro encoding.


Ejemplo #1 Ejemplo de tabla de traducción

(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES | ENT_HTML5));

El resultado del ejemplo sería algo similar a:

array(1510) {
  string(9) "&NewLine;"
  string(6) "&excl;"
  string(6) "&quot;"
  string(5) "&num;"
  string(8) "&dollar;"
  string(8) "&percnt;"
  string(5) "&amp;"
  string(6) "&apos;"
  // ...

Ver también

add a note

User Contributed Notes 13 notes

michael dot genesis at gmail dot com
12 years ago
The fact that MS-word and some other sources use CP-1252, and that it is so close to Latin1 ('ISO-8859-1') causes a lot of confusion. What confused me the most was finding that mySQL uses CP-1252 by default.

You may run into trouble if you find yourself tempted to do something like this:
[chr(149)] = '&bull;'; // Bullet
$trans[chr(150)] = '&ndash;'; // En Dash
$trans[chr(151)] = '&mdash;'; // Em Dash
$trans[chr(152)] = '&tilde;'; // Small Tilde
$trans[chr(153)] = '&trade;'; // Trade Mark Sign

Don't do it. DON'T DO IT!

You can use:
= get_html_translation_table(HTML_ENTITIES, ENT_NOQUOTES, 'WINDOWS-1252');

or just convert directly:
= htmlentities($input, ENT_NOQUOTES, 'WINDOWS-1252');

But your web page is probably encoded UTF-8, and you probably don't really want CP-1252 text flying around, so fix the character encoding first:
= mb_convert_encoding($input, 'UTF-8', 'WINDOWS-1252');
$ouput = htmlentities($output);
kevin at cwsmailbox dot xom
13 years ago
Be careful using get_html_translation_table() in a loop, as it's very slow.
Kenneth Kin Lum
15 years ago
to display the mapping on a webpage no matter what the server encoding is, this can be used

echo "<pre>\n";
echo htmlentities(print_r((get_html_translation_table(HTML_SPECIALCHARS)), true));
echo htmlentities(print_r((get_html_translation_table(HTML_ENTITIES)), true));

since get_html_translation_table() actually gives the special chars in iso-8859-1 (Latin-1) encoding, so to see the tables correctly using


your server needs to give a HTTP header as iso-8859-1, unless you use header() or manually set the browser's encoding setting to iso-8859-1. And you need to view the source of the page to see the mapping. (except English version of IE 7 outputs the page source as iso-8859-1 anyway).
dirk at hartmann dot net
22 years ago
It works only with the first 256 Codepositions.
For Higher Positions, for Example &#1092;
(a kyrillic Letter) it shows the same.
iain (duh)
16 years ago
I wrote a quick little function for converting something like '&middot;' into '&#183;':

$to_convert = '&middot;';
$table = get_html_translation_table(HTML_ENTITIES);
$equiv = '&#'.ord(array_search($to_convert,$table)).';';
Jérôme Jaglale
17 years ago
htmlentities includes htmlspecialchars, so here's how to convert an UTF-8 string :
htmlentities($string, ENT_QUOTES, 'UTF-8');
Patrick nospam at nospam mesopia dot com
19 years ago
Not sure what's going on here but I've run into a problem that others might face as well...


= array_flip(get_html_translation_table(HTML_ENTITIES,ENT_QUOTES));


returns the single quote ' as being equal to &#39; while


= htmlentities($string,ENT_QUOTES);

returns it as being equal to &#039;

I've had to do a specific string replacement for the time being... Not sure if it's an issue with the function or the array manipulation.

Maurizio Siliani at trident dot it
16 years ago
If you have troubles (like me) getting data from ISO-8859-1 encoded forms where user copy and paste from word, this routine could be useful.
It adds to the standard get_html_translation_table the codes of the characters usually M$ Word replacs into typed text.
Otherwise those characters would never be displayed correctly in html output.

function get_html_translation_table_CP1252() {
$trans = get_html_translation_table(HTML_ENTITIES);
$trans[chr(130)] = '&sbquo;'; // Single Low-9 Quotation Mark
$trans[chr(131)] = '&fnof;'; // Latin Small Letter F With Hook
$trans[chr(132)] = '&bdquo;'; // Double Low-9 Quotation Mark
$trans[chr(133)] = '&hellip;'; // Horizontal Ellipsis
$trans[chr(134)] = '&dagger;'; // Dagger
$trans[chr(135)] = '&Dagger;'; // Double Dagger
$trans[chr(136)] = '&circ;'; // Modifier Letter Circumflex Accent
$trans[chr(137)] = '&permil;'; // Per Mille Sign
$trans[chr(138)] = '&Scaron;'; // Latin Capital Letter S With Caron
$trans[chr(139)] = '&lsaquo;'; // Single Left-Pointing Angle Quotation Mark
$trans[chr(140)] = '&OElig; '; // Latin Capital Ligature OE
$trans[chr(145)] = '&lsquo;'; // Left Single Quotation Mark
$trans[chr(146)] = '&rsquo;'; // Right Single Quotation Mark
$trans[chr(147)] = '&ldquo;'; // Left Double Quotation Mark
$trans[chr(148)] = '&rdquo;'; // Right Double Quotation Mark
$trans[chr(149)] = '&bull;'; // Bullet
$trans[chr(150)] = '&ndash;'; // En Dash
$trans[chr(151)] = '&mdash;'; // Em Dash
$trans[chr(152)] = '&tilde;'; // Small Tilde
$trans[chr(153)] = '&trade;'; // Trade Mark Sign
$trans[chr(154)] = '&scaron;'; // Latin Small Letter S With Caron
$trans[chr(155)] = '&rsaquo;'; // Single Right-Pointing Angle Quotation Mark
$trans[chr(156)] = '&oelig;'; // Latin Small Ligature OE
$trans[chr(159)] = '&Yuml;'; // Latin Capital Letter Y With Diaeresis
return $trans;
kumar at
21 years ago
without heavy scientific analysis, this seems to work as a quick fix to making text originating from a Microsoft Word document display as HTML:

function DoHTMLEntities ($string)
$trans_tbl = get_html_translation_table (HTML_ENTITIES);

// MS Word strangeness..
// smart single/ double quotes:
$trans_tbl[chr(145)] = '\'';
$trans_tbl[chr(146)] = '\'';
$trans_tbl[chr(147)] = '&quot;';
$trans_tbl[chr(148)] = '&quot;';

// Acute 'e'
$trans_tbl[chr(142)] = '&eacute;';

strtr ($string, $trans_tbl);
Alex Minkoff
19 years ago
If you want to display special HTML entities in a web browser, you can use the following code:

$entities = get_html_translation_table(HTML_ENTITIES);
foreach ($entities as $entity) {
$new_entities[$entity] = htmlspecialchars($entity);
echo "<pre>";
echo "</pre>";

If you don't, the key name of each element will appear to be the same as the element content itself, making it look mighty stupid. ;)
robertn972 at gmail dot com
15 years ago
I found this useful in converting latin characters

function convertLatin1ToHtml($str) {
$allEntities = get_html_translation_table(HTML_ENTITIES, ENT_NOQUOTES);
$specialEntities = get_html_translation_table(HTML_SPECIALCHARS, ENT_NOQUOTES);
$noTags = array_diff($allEntities, $specialEntities);
$str = strtr($str, $noTags);
kevin_bro at hostedstuff dot com
21 years ago
Alans version didn't seem to work right. If you're having the same problem consider using this slightly modified version instead:

function unhtmlentities ($string) {
$trans_tbl = get_html_translation_table (HTML_ENTITIES);
$trans_tbl = array_flip ($trans_tbl);
$ret = strtr ($string, $trans_tbl);
return preg_replace('/&#(\d+);/me',
alan at akbkhome dot com
21 years ago
If you want to decode all those &#123; symbols as well....

function unhtmlentities ($string) {
$trans_tbl = get_html_translation_table (HTML_ENTITIES);
$trans_tbl = array_flip ($trans_tbl);
$ret = strtr ($string, $trans_tbl);
return preg_replace('/\&\#([0-9]+)\;/me',
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