Be careful using get_html_translation_table() in a loop, as it's very slow.
get_html_translation_table
(PHP 4, PHP 5, PHP 7, PHP 8)
get_html_translation_table — Restituisce la tabella di decodifica utilizzata da htmlspecialchars() e htmlentities()
Descrizione
La funzione get_html_translation_table() restituisce la tabella di decodifica utilizzata dalle funzioni htmlspecialchars() e htmlentities().
Esistono due nuove costanti
(HTML_ENTITIES,
HTML_SPECIALCHARS) che permettono di indicare
quale tabella sid esidera. Inoltre nelle funzioni
htmlspecialchars() e
htmlentities(), opzionalmente, si può specificare
il quote_style con cui si lavora. Il default è
ENT_COMPAT. Vedere la descrizione di queste modalità in
htmlspecialchars().
Example #1 Esempio della tabella di decodifica
<?php
$trans = get_html_translation_table(HTML_ENTITIES);
$str = "Hallo & <Frau> & Krämer";
$encoded = strtr($str, $trans);
echo $encoded;
?>Il precedente esempio visualizzerà:
Hallo & <Frau> & Krämer
Vedere anche: htmlspecialchars(), htmlentities(), strtr() e array_flip().
add a note
User Contributed Notes 13 notes
kevin at cwsmailbox dot xom ¶
14 years ago
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)] = '•'; // Bullet
$trans[chr(150)] = '–'; // En Dash
$trans[chr(151)] = '—'; // Em Dash
$trans[chr(152)] = '˜'; // Small Tilde
$trans[chr(153)] = '™'; // 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);
?>
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).
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 ф
(a kyrillic Letter) it shows the same.
iain (duh) workingsoftware.com.au ¶
17 years ago
I wrote a quick little function for converting something like '·' into '·':
$to_convert = '·';
$table = get_html_translation_table(HTML_ENTITIES);
$equiv = '&#'.ord(array_search($to_convert,$table)).';';
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 ' while
<?php
$translatedString = htmlentities($string,ENT_QUOTES);
?>
returns it as being equal to '
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
Jérôme Jaglale ¶
17 years ago
htmlentities includes htmlspecialchars, so here's how to convert an UTF-8 string :
htmlentities($string, ENT_QUOTES, 'UTF-8');
Maurizio Siliani at trident dot it ¶
17 years ago
If you have troubles (like me) getting data from ISO-8859-1 encoded forms where user copy and paste from word, this routine could be useful.
It adds to the standard get_html_translation_table the codes of the characters usually M$ 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)] = '‚'; // Single Low-9 Quotation Mark
$trans[chr(131)] = 'ƒ'; // Latin Small Letter F With Hook
$trans[chr(132)] = '„'; // Double Low-9 Quotation Mark
$trans[chr(133)] = '…'; // Horizontal Ellipsis
$trans[chr(134)] = '†'; // Dagger
$trans[chr(135)] = '‡'; // Double Dagger
$trans[chr(136)] = 'ˆ'; // Modifier Letter Circumflex Accent
$trans[chr(137)] = '‰'; // Per Mille Sign
$trans[chr(138)] = 'Š'; // Latin Capital Letter S With Caron
$trans[chr(139)] = '‹'; // Single Left-Pointing Angle Quotation Mark
$trans[chr(140)] = 'Π'; // Latin Capital Ligature OE
$trans[chr(145)] = '‘'; // Left Single Quotation Mark
$trans[chr(146)] = '’'; // Right Single Quotation Mark
$trans[chr(147)] = '“'; // Left Double Quotation Mark
$trans[chr(148)] = '”'; // Right Double Quotation Mark
$trans[chr(149)] = '•'; // Bullet
$trans[chr(150)] = '–'; // En Dash
$trans[chr(151)] = '—'; // Em Dash
$trans[chr(152)] = '˜'; // Small Tilde
$trans[chr(153)] = '™'; // Trade Mark Sign
$trans[chr(154)] = 'š'; // Latin Small Letter S With Caron
$trans[chr(155)] = '›'; // Single Right-Pointing Angle Quotation Mark
$trans[chr(156)] = 'œ'; // Latin Small Ligature OE
$trans[chr(159)] = 'Ÿ'; // Latin Capital Letter Y With Diaeresis
ksort($trans);
return $trans;
}
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. ;)
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)] = '"';
$trans_tbl[chr(148)] = '"';
// Acute 'e'
$trans_tbl[chr(142)] = 'é';
return strtr ($string, $trans_tbl);
}
?>
robertn972 at gmail dot com ¶
16 years ago
I found this useful in converting latin characters
<?php
function convertLatin1ToHtml($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);
return $str;
}
?>
kevin_bro at hostedstuff dot com ¶
21 years ago
Alans version didn't seem to work right. If you're having the same problem consider using this slightly modified version instead:
function unhtmlentities ($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);
}
alan at akbkhome dot com ¶
22 years ago
If you want to decode all those { symbols as well....
function unhtmlentities ($string) {
$trans_tbl = get_html_translation_table (HTML_ENTITIES);
$trans_tbl = array_flip ($trans_tbl);
$ret = strtr ($string, $trans_tbl);
return preg_replace('/\&\#([0-9]+)\;/me',
"chr('\\1')",$ret);
}
