   #PHP Manual String functions html_entity_decode htmlspecialchars

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                                 htmlentities

   (PHP 3, PHP 4 )
   htmlentities --  Convert all applicable characters to HTML entities

Description

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

   This function is identical to htmlspecialchars() in all ways, except
   with htmlentities(), all characters which have HTML character entity
   equivalents are translated into these entities.

   Like htmlspecialchars(), 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.

   Support for the optional quote parameter was added in PHP 4.0.3.

   Like htmlspecialchars(), it takes an optional third argument charset
   which defines character set used in conversion. Support for this
   argument was added in PHP 4.1.0. Presently, the ISO-8859-1 character
   set is used as the default.

   Following character sets are supported in PHP 4.3.0 and later.

   Table 2. Supported charsets
   Charset Aliases Description
   ISO-8859-1 ISO8859-1 Western European, Latin-1
   ISO-8859-15 ISO8859-15 Western European, Latin-9. Adds the Euro sign,
   French and Finnish letters missing in Latin-1(ISO-8859-1).
   UTF-8   ASCII compatible multi-byte 8-bit Unicode.
   cp866 ibm866, 866 DOS-specific Cyrillic charset. This charset is
   supported in 4.3.2.
   cp1251 Windows-1251, win-1251, 1251 Windows-specific Cyrillic charset.
   This charset is supported in 4.3.2.
   cp1252 Windows-1252, 1252 Windows specific charset for Western
   European.
   KOI8-R koi8-ru, koi8r Russian. This charset is supported in 4.3.2.
   BIG5 950 Traditional Chinese, mainly used in Taiwan.
   GB2312 936 Simplified Chinese, national standard character set.
   BIG5-HKSCS   Big5 with Hong Kong extensions, Traditional Chinese.
   Shift_JIS SJIS, 932 Japanese
   EUC-JP EUCJP Japanese

     Note: Any other character sets are not recognized and ISO-8859-1
     will be used instead.

   If you're wanting to decode instead (the reverse) you can use
   html_entity_decode().

   Example 1. A htmlentities() example
   <?php
   $str = "A 'quote' is <b>bold</b>";
   // Outputs: A 'quote' is &lt;b&gt;bold&lt;/b&gt;
   echo htmlentities($str);
   // Outputs: A &#039;quote&#039; is &lt;b&gt;bold&lt;/b&gt;
   echo htmlentities($str, ENT_QUOTES);
   ?>

   See also html_entity_decode(), get_html_translation_table(),
   htmlspecialchars(), nl2br(), and urlencode().
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