get_html_translation_table

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

get_html_translation_table — Devuelve la tabla de traducción utilizada por htmlspecialchars() y htmlentities()

Descripción

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().

Nota:
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().

Parámetros

table

Qué tabla devolver. Puede ser HTML_ENTITIES o HTML_SPECIALCHARS).

flags

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_XHTML`	Tabla para XHTML.
`ENT_HTML5`	Tabla para HTML 5.

encoding

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`.

Ejemplos

Ejemplo #1 Ejemplo de tabla de traducción

<?php
var_dump(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

htmlspecialchars() - Convierte caracteres especiales en entidades HTML
htmlentities() - Convierte todos los caracteres aplicables a entidades HTML
html_entity_decode() - Convierte todas las entidades HTML a sus caracteres correspondientes

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User Contributed Notes 11 notes

down

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:

<?php

    $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

?>



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



You can use:

<?php

    $translationTable = get_html_translation_table(HTML_ENTITIES, ENT_NOQUOTES, 'WINDOWS-1252');

?>



or just convert directly:

<?php

    $output = htmlentities($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:

<?php

    $output = mb_convert_encoding($input, 'UTF-8', 'WINDOWS-1252');

    $ouput = htmlentities($output);

?>

down

kevin at cwsmailbox dot xom ¶

14 years ago

Be careful using get_html_translation_table() in a loop, as it's very slow.

down

Kenneth Kin Lum ¶

16 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

  print_r(get_html_translation_table(HTML_ENTITIES));

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).

down

dirk at hartmann dot net ¶

23 years ago

get_html_translation_table

It works only with the first 256 Codepositions.

For Higher Positions, for Example &#1092;

(a kyrillic Letter) it shows the same.

down

Jérôme Jaglale ¶

17 years ago

htmlentities includes htmlspecialchars, so here's how to convert an UTF-8 string :
htmlentities($string, ENT_QUOTES, 'UTF-8');

down

iain (duh) workingsoftware.com.au ¶

17 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)).';';

down

Maurizio Siliani at trident dot it ¶

17 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
    $trans[chr(159)] = '&Yuml;';    // Latin Capital Letter Y With Diaeresis
    ksort($trans);
    return $trans;
}

down

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...

<?php

$translations = array_flip(get_html_translation_table(HTML_ENTITIES,ENT_QUOTES));

?>

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

<?php

$translatedString = htmlentities($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.

-Pat

down

-2

kumar at chicagomodular.com ¶

22 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:



<?php

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;';

        

        return strtr ($string, $trans_tbl);

    }

?>

down

-3

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($entity);
}
echo "<pre>";
print_r($new_entities);
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. ;)

down

-4

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, $trans_tbl);
   return preg_replace('/&#(\d+);/me', 
      "chr('\\1')",$ret);
}

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