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htmlspecialchars_decode

(PHP 5 >= 5.1.0RC1)

htmlspecialchars_decode --  Convert special HTML entities back to characters

说明

string htmlspecialchars_decode ( string string [, int quote_style] )

This function is the opposite of htmlspecialchars(). It converts special HTML entities back to characters.

The converted entities are: &, " (when ENT_NOQUOTES is not set), ' (when ENT_QUOTES is set), < and >.

参数

string

The string to decode

quote_style

The quote style. One of the following constants:

表格 1. quote_style constants

Constant NameDescription
ENT_COMPATWill convert double-quotes and leave single-quotes alone (default)
ENT_QUOTESWill convert both double and single quotes
ENT_NOQUOTESWill leave both double and single quotes unconverted

返回值

Returns the decoded string.

范例

例子 1. A htmlspecialchars_decode() example

<?php
$str = '<p>this -&gt; &quot;</p>';

echo htmlspecialchars_decode($str);

// note that here the quotes aren't converted
echo htmlspecialchars_decode($str, ENT_NOQUOTES);
?>

上例将输出：

<p>this -> "</p>
<p>this -> &quot;</p>

参见

htmlspecialchars()
html_entity_decode()
get_html_translation_table()


add a note add a note User Contributed Notes
TheSin
10-May-2006 05:51
Here is how you can get this function in php < 5.1, just make sure this function is before you try and call the function.

if (!function_exists('htmlspecialchars_decode')) {
       function htmlspecialchars_decode($str, $options="") {
               $trans = get_html_translation_table(HTML_SPECIALCHARS, $options);

               $decode = ARRAY();
               foreach ($trans AS $char=>$entity) {
                       $decode[$entity] = $char;
               }

               $str = strtr($str, $decode);

               return $str;
       }
}
se at designlinks dot net
15-Dec-2005 12:43
The code supplied by or-k at or-k dot com (14-Sep-2005 09:15) is better served using html_entity_decode() for PHP>=4.3.0.
geoffers@gmail (14-Jul-2005 01:38) offers the best htmlspecialchars_decode() for php4 users.
or-k at or-k dot com
14-Sep-2005 05:15
that works also with &auml; and &quot; and so on.
get_html_translation_table(HTML_ENTITIES) => offers more characters than HTML_SPECIALCHARS

function htmlspecialchars_decode_PHP4($uSTR)
{
 return strtr($uSTR, array_flip(get_html_translation_table(HTML_ENTITIES, ENT_QUOTES)));
}
geoffers@gmail
14-Jul-2005 09:38
[Update of previous note, having noticed I forgot to put in quote style]

PHP4 Compatible function:

<?php

function htmlspecialchars_decode_php4 ($str, $quote_style = ENT_COMPAT) {
   return strtr($str, array_flip(get_html_translation_table(HTML_SPECIALCHARS, $quote_style)));
}

?>
geoffers at gmail dot com
14-Jul-2005 09:30
For PHP4 Compatibility:

<?php

function htmlspecialchars_decode_php4 ($str) {
   return strtr($str, array_flip(get_html_translation_table(HTML_SPECIALCHARS)));
}

?>
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