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# htmlentities

(PHP 3, PHP 4 , PHP 5)

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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