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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 :

表格 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.

PHP 4.3.0 及其后续版本支持如下字符集。

表格 2. 已支持字符集

字符集 别名 描述
ISO-8859-1 ISO8859-1 西欧，Latin-1
ISO-8859-15 ISO8859-15 西欧，Latin-9。增加了 Latin-1（ISO-8859-1）中缺少的欧元符号、法国及芬兰字母。
UTF-8   ASCII 兼容多字节 8-bit Unicode。
cp866 ibm866, 866 DOS-特有的 Cyrillic 字母字符集。PHP 4.3.2 开始支持该字符集。
cp1251 Windows-1251, win-1251, 1251 Windows-特有的 Cyrillic 字母字符集。PHP 4.3.2 开始支持该字符集。
cp1252 Windows-1252, 1252 Windows 对于西欧特有的字符集。
KOI8-R koi8-ru, koi8r 俄文。PHP 4.3.2 开始支持该字符集。
BIG5 950 繁体中文，主要用于中国台湾。
GB2312 936 简体中文，国际标准字符集。
BIG5-HKSCS   繁体中文，Big5 的延伸，主要用于香港。
Shift_JIS SJIS, 932 日文。
EUC-JP EUCJP 日文。

注: ISO-8859-1 将代替任何其它无法识别的字符集。

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

例子 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() .

后退 起点 前进
html_entity_decode 上一级 htmlspecialchars_decode