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# html_entity_decode

(PHP 4 >= 4.3.0)

html_entity_decode -- Convert all HTML entities to their applicable characters

## Description

string html_entity_decode ( string string [, int quote_style [, string charset]])

html_entity_decode() is the opposite of htmlentities() in that it converts all HTML entities to their applicable characters from `string`.

The optional second `quote_style` parameter lets you define what will be done with 'single' and "double" quotes. It takes on one of three constants with the default being `ENT_COMPAT`:

Table 1. Available `quote_style` constants

Constant Name | Description
--- | ---
`ENT_COMPAT` | Will convert double-quotes and leave single-quotes alone.
`ENT_QUOTES` | Will convert both double and single quotes.
`ENT_NOQUOTES` | Will leave both double and single quotes unconverted.

The ISO-8859-1 character set is used as default for the optional third `charset`. This defines the character set used in conversion.

Example 1. Decoding html entities
    <?php
    $orig = "I'll \"walk\" the <b>dog</b> now";

    $a = htmlentities($orig);

    $b = html_entity_decode($a);

    echo $a; // I'll &quot;walk&quot; the &lt;b&gt;dog&lt;/b&gt; now

    echo $b; // I'll "walk" the <b>dog</b> now

    // For users prior to PHP 4.3.0 you may do this:
    function unhtmlentities ($string)
    {
        $trans_tbl = get_html_translation_table (HTML_ENTITIES);
        $trans_tbl = array_flip ($trans_tbl);
        return strtr ($string, $trans_tbl);
    }

    $c = unhtmlentities($a);

    echo $c; // I'll "walk" the <b>dog</b> now

    ?>

> Note: You might wonder why trim(html_entity_decode('&nbsp;')); doesn't reduce the string to an empty string, that's because the '&nbsp;' entity is not ASCII code 32 (which is stripped by trim()) but ASCII code 160 (0xa0) in the default ISO 8859-1 characterset.

See also htmlentities(), htmlspecialchars(), get_html_translation_table(), htmlspecialchars() and urldecode().

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